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243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

R

raider1v1

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Mar 16, 2010
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Kansas City, MO
I was talking with one of my friends today about these three rounds and what would be the best choice for these two scenario.

1. Steel @ 500 yds

2. Hunting out to 500 yds

i dont think that one cartridge will be the best in both groups. We were talking about the GAP10 as the platform.

What do you guys think?
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

Personally, I wouldn't hunt out to 500 yards.

However, given your scenario I think the 6.5 would be the best choice. Ammo is inexpensive and already available. There isn't a lot of difference at <500 and the bigger (140gn) Bullet will lay the smack down better. And don't listen to the BS about "it's all bullet placement". Animals move and they're not a static piece of paper. Go with what gives you the best odds.

BTW, 243 is not an option because it will not shoot the heavies worth a crap in a short barrel. If you try and make it, the 6 Creedmore will smoke it.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

6.5. I'm not a fan of 243/6mm so I'm biased, but for hitting out to 500+ the 6.5's heavier bullets are a lot better IMHO.

I've shot deer at 450+ yards with a 260. I used to have a 243... I fail to see why you don't think one cartridge will be better at both. Given the choice, id take a 260/6.5 over a 243/6mm for anything, every time. More energy. Heavier bullets, better ballistics, better everything. I don't know why anyone would ever buy a 243 since the 260/6.5 have been invented. (I don't like 243's)
wink.gif
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

Gasser 6.5 due to length, Bolt 243 hands down.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: i_rep</div><div class="ubbcode-body">Gasser 6.5 due to length, Bolt 243 hands down. </div></div>

do you have reasons?

the 243 didnt seem especially great either way?

for the other guys, do you have a choice for steel?
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

.260 all the way for reasons stated above. No comparison really.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

The ignorance here cracks me up. If we are talking the confines of the OPs question, then the 6.5s all day. If we are talking pure performance than guys like adrenaline junkie don't know what they're talking about. "better ballistics"? Do some research and get a clue-you're ignorant.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

By better ballistics, I meant for shooting long distance, the heavier bullets that you can shoot through the 6.5 with their higher b.c. and s.d., it's going to outperform the 243 for long range shooting. Better ballistics may not have been the exactly correct choice of words, but I am correct as you even stated in your post.i apilogize if you're butt hurt that you're a 243 fan and someone points out another cartridge outperforms it in every way...
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

For a paper match 243 pushing the [email protected] is damn near the best ballistics you can buy.

Steel past 800, 6.5/260...

The 115dtac has a bc of .585 at 3100+ fps

The 140amax has a bc of .585 at 2900+ fps most hover around 2880.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

It's all consumables...shoot a 308 if you want barrel life.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

In GAP-10 platform you can eliminate the 243 out of the gate, limited to 2.800" OAL either the version of the Creedmoor is a superior choice.
I've seen the 260 mentioned but again, in a GAP-10 with mag constraint of 2.800" the 6.5 Creedmoor is better overall fit then the 260. I'm a 260 guy, though I do have my first 6.5 Creedmoor on the way, but facts are facts. 2.800" max OAL the Creedmoor gives up little to nothing to the 260 from a gasser.

Bolt gun I'd give the nod to a larger case to push the bigger bullets. OP didn't ask about bolt gun, asked about a GAP-10.

Banging steel and punching paper I'd go 6 Creedmoor.

Throw in hunting and suggestion shifts to the 6.5 for the extra energy, larger diameter hole you are going to poke in animal.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

Isn't the c.o.a.l of the 308/260/243 2.800 anyway? Is it a concern only because of the very largest/longest bullets, or something else? I've only loaded 155gr bullets in my LAR-308, so I haven't experienced any length problems.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

You don't know what you're talking about. You're just butt hurt because your ignorance prevents you from the truth. There is very few rounds that are better ballisticly than the 115 DTAC @ 3100. And it hits steel just fine. Show me your 6.5 Creedmore/260 that will beat 6.5 to 1K with <1.7 mil wind @ 10mph FV. Because you don't have it. I've had numerous.

Plus 2k rounds barrel life. That's real world experience not "what I've read". Unless you're trying to knock steel down, it hits just fine.

For killing large animals at distance the weight of the 6.5 will help but from a ballistic and target standpoint, no contest.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

Take the gasser out of the situation and run the number on the 115 dtac pushed over 3000 and then let your ego hit the floor. Stop listening to what people tell you and watch what actually works. Even in a gasser you wouldnt really be giving up much going to 6mm route for steel. Setting that bullet long in a bolt gun and I will run under your 6.5 to 1000, all the while not feeling undergunned at all. Keep reading your internet stories and makeing yourself look stupid.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body"> Show me your 6.5 Creedmore/260 that will beat 6.5 to 1K with <1.7 mil wind @ 10mph FV. Because you don't have it. I've had numerous.

</div></div>

I push the 140 JLK with a BC of .632 at 2925. Not an extremely hot load, just a fast barrel. 1.5 mils of wind at 1000 at 3500 DA.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bward</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body"> Show me your 6.5 Creedmore/260 that will beat 6.5 to 1K with <1.7 mil wind @ 10mph FV. Because you don't have it. I've had numerous.

</div></div>

I push the 140 JLK with a BC of .632 at 2925. Not an extremely hot load, just a fast barrel. 1.5 mils of wind at 1000 at 3500 DA.</div></div>

That's the very exception to the rule. Just like the rare 243 that will push the 115s past 3200. It happens, just cant replicate it even with the same barrel manufacturer.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: adrenaline junkie</div><div class="ubbcode-body">Isn't the c.o.a.l of the 308/260/243 2.800 anyway? Is it a concern only because of the very largest/longest bullets, or something else? I've only loaded 155gr bullets in my LAR-308, so I haven't experienced any length problems. </div></div>

Only in the reloading books is max OAL 2.800" for 243/260/7-08/308, that is because of the mag constraint of the mag box on a Rem 721/700 & autoloaders when the 308 first was developed. Way too many options that allow you to run longer OALs to stick with the 2.800" constraint IMHO.
Standard AICS magazine allows 2.860" OAL.
Modified AICS/Accurate w/o front plate/Alpha type 2 magazine/AI AW magazine allows 2.980" OAL. Rem 700 you need to notch feed ramp to run longer then 2.900" but is a pretty minor mod.
Win 70 with block removed from rear of factory mag box, bolt stop trimmed I can run 3.030" OAL from the magazine. If I go to CDI bottom metal and AICS type mag, then I'm back to 2.980" as a max.

Longer the bullet, then the larger the issue becomes if you are limited to 2.800". Once you get boattail/bearing junction of bullet up at neck/shoulder junction, you let the 243/260/7-08/308 show what they can do. Limit any of those rounds to 2.800 and it hamstrings the round, especially with the longer, heavier bullets.

243 Win loaded with 115s so bullet is not down in case, is very hard to beat from flat/wind bucking standpoint. Tactical/hunting use I can see where you'll be 2K rds of barrel life. F-class use the barrel probably won't last that long but a lot of that is the 0.5 MOA at 600 to 1K requirement.
6 Creedmoor with longer neck, pushing 115s out of a gasser at 2950 fps....going to be pretty flat and buck wind pretty well. 105 Hornady BTHP at 3050 is no slouch out of a 6 CM gasser either.

I'd still go 6.5 Creedmoor for putting animals down.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: McCourt Munitions LLC</div><div class="ubbcode-body">In GAP-10 platform you can eliminate the 243 out of the gate, limited to 2.800" OAL either the version of the Creedmoor is a superior choice.
I've seen the 260 mentioned but again, in a GAP-10 with mag constraint of 2.800" the 6.5 Creedmoor is better overall fit then the 260. I'm a 260 guy, though I do have my first 6.5 Creedmoor on the way, but facts are facts. 2.800" max OAL the Creedmoor gives up little to nothing to the 260 from a gasser.

Bolt gun I'd give the nod to a larger case to push the bigger bullets. OP didn't ask about bolt gun, asked about a GAP-10.

Banging steel and punching paper I'd go 6 Creedmoor.

Throw in hunting and suggestion shifts to the 6.5 for the extra energy, larger diameter hole you are going to poke in animal.
</div></div>

thanks for the info! is there any drop tables or reloading data for the 6 Creedmoor yet?

So to summarize the thread so far,

in the gap10 -

*243 is nice, but the loads to fit in the mag are not equal to the 6 or the 6.5 creedmoor.

*6 creedmoor is better for target shooting

*6.5 creedmoor is better for hunting, but still very good for targets


What about if the platform was a bolt gun w/ a 24" barrel? would the recommendations still be the same for the steel or hunting? or would the 243 get more of a consideration due to the bolt gun being able to take a longer COAL?
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

I have the 6cm, the 260, and 308 in gap10. If all your talking about is to 500, just run the 308, get McCourt to Load you some ammo and go, there's not much difference at that short a distance. Have to say though, the 6cm bangs steel at that distance and furture than the other 2.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Ouch!!!!</div><div class="ubbcode-body">For a paper match 243 pushing the [email protected] is damn near the best ballistics you can buy.

Steel past 800, 6.5/260...

The 115dtac has a bc of .585 at 3100+ fps

The 140amax has a bc of .585 at 2900+ fps most hover around 2880.

</div></div>

I thought the 115gr DTAC was hard to run out of the 243 due to case and magazine length. Isn't that the reason for the 6mm Creedmoor's and 6XC's existence?
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sititunga1</div><div class="ubbcode-body">
I thought the 115gr DTAC was hard to run out of the 243 due to case and magazine length. Isn't that the reason for the 6mm Creedmoor's and 6XC's existence?
</div></div>

Absolutely not. The 115 is incredible out of the 243. The reason for the 6Creed is because you need a long barrel to run the 115s to speed and you cant run a long barrel on an AR very effectively. The 6XC was just a marketing ploy for David Tubb.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body">
What about if the platform was a bolt gun w/ a 24" barrel? would the recommendations still be the same for the steel or hunting? or would the 243 get more of a consideration due to the bolt gun being able to take a longer COAL?</div></div>

If you're going to do a bolt gun 243 for the 115s, I would not go shorter than a 26" barrel. For me personally, I wouldn't go shorter than 27".
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bward</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body"> Show me your 6.5 Creedmore/260 that will beat 6.5 to 1K with <1.7 mil wind @ 10mph FV. Because you don't have it. I've had numerous.

</div></div>

I push the 140 JLK with a BC of .632 at 2925. Not an extremely hot load, just a fast barrel. 1.5 mils of wind at 1000 at 3500 DA.</div></div>

That's the very exception to the rule. Just like the rare 243 that will push the 115s past 3200. It happens, just cant replicate it even with the same barrel manufacturer.</div></div>

I agree with the speed being the exception not the rule, but the BC is where you can really make up some wind. At the same atmospheric data as above, you could run the 140 JLK as slow as 2725 fps and still be 1.7 mils at 1000. Not trying to be a smartass, I'm just a 6.5 fan and making a case for it.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bward</div><div class="ubbcode-body">I agree with the speed being the exception not the rule, but the BC is where you can really make up some wind. At the same atmospheric data as above, you could run the 140 JLK as slow as 2725 fps and still be 1.7 mils at 1000. Not trying to be a smartass, I'm just a 6.5 fan and making a case for it.</div></div>

You're making an intelligent argument and I would agree the JLK's are kick ass bullets. In fact, I'm working with McCourt on LD for a 6.5 using JLKs.

The point is there is preference and there is capability. The 6.5 in many configurations is an excellent round. It's just not quite the race car the 243 is. If you took 243 away from me a 6.5 of 7mm is really the only other smart option.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

For 500yds who cares? Pick one and eat the barrel up learning your new rifle.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bward</div><div class="ubbcode-body">I agree with the speed being the exception not the rule, but the BC is where you can really make up some wind. At the same atmospheric data as above, you could run the 140 JLK as slow as 2725 fps and still be 1.7 mils at 1000. Not trying to be a smartass, I'm just a 6.5 fan and making a case for it.</div></div>

You're making an intelligent argument and I would agree the JLK's are kick ass bullets. In fact, I'm working with McCourt on LD for a 6.5 using JLKs.

The point is there is preference and there is capability. The 6.5 in many configurations is an excellent round. It's just not quite the race car the 243 is. If you took 243 away from me a 6.5 of 7mm is really the only other smart option. </div></div>

I've been extremely impressed with the JLK's consistency and design. From my measurements, the 130's and the 140's both shoot well jumped. They have the same nose dimensions, with the 140 just having more surface bearing to account for the extra 10 grains. Good luck with them, and back to the original question at hand lol.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

I run 2.835 in my ar mags...just saying.

With rl17 I could've went 3200+ in my bolt .243 with 115's.

Like chase said puck one and burn it. 6.5cm offers factory ammo at walmart with 140 amax...good luck and enjoy shooting.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

What mag is allowing you 2.835" OAL?

Armalite you can load out to 2.850" easy enough, DPMS I can go 2.810" on some but to be safe for all mags 2.800" is the limit.
P-mags allowing a bit longer OAL?

I stand by my statement that the 6 or 6.5 CM is a better fit to an AR platform. Gas volume, port pressure, etc.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body">
What about if the platform was a bolt gun w/ a 24" barrel? would the recommendations still be the same for the steel or hunting? or would the 243 get more of a consideration due to the bolt gun being able to take a longer COAL?</div></div>

If you're going to do a bolt gun 243 for the 115s, I would not go shorter than a 26" barrel. For me personally, I wouldn't go shorter than 27". </div></div>

I thought GAP had had some good results with the DTAC out of there 6mm CM GAP10s - these are all built with 23 inch barrels I think. I thought I heard some velocity claims of 2950 from those using the DTAC, furthermore Tubbs' has been claiming 3000 from a 23 inch tubed bolt gun using the 6XC DTAC. Like you say the DTAC is no good out of a 243 gasser because of case and mag length limitations.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: McCourt Munitions LLC</div><div class="ubbcode-body">In GAP-10 platform you can eliminate the 243 out of the gate, limited to 2.800" OAL either the version of the Creedmoor is a superior choice.
I've seen the 260 mentioned but again, in a GAP-10 with mag constraint of 2.800" the 6.5 Creedmoor is better overall fit then the 260. I'm a 260 guy, though I do have my first 6.5 Creedmoor on the way, but facts are facts. 2.800" max OAL the Creedmoor gives up little to nothing to the 260 from a gasser.

Bolt gun I'd give the nod to a larger case to push the bigger bullets. OP didn't ask about bolt gun, asked about a GAP-10.

Banging steel and punching paper I'd go 6 Creedmoor.

Throw in hunting and suggestion shifts to the 6.5 for the extra energy, larger diameter hole you are going to poke in animal.
</div></div>

thanks for the info! is there any drop tables or reloading data for the 6 Creedmoor yet?

So to summarize the thread so far,

in the gap10 -

*243 is nice, but the loads to fit in the mag are not equal to the 6 or the 6.5 creedmoor.

*6 creedmoor is better for target shooting

*6.5 creedmoor is better for hunting, but still very good for targets


What about if the platform was a bolt gun w/ a 24" barrel? would the recommendations still be the same for the steel or hunting? or would the 243 get more of a consideration due to the bolt gun being able to take a longer COAL? </div></div>

24" bolt gun, I'd go 243 (260 would be better but not on your list) set up to put BT/bearing right at neck/shoulder. You'll lose a bit of velocity compared to a longer barrel but still be able to drive the bigger match bullets plenty fast from the 24" barreled 243.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

ok so far have I got this correct?

GAP10 - Steel - 6 CM
GAP10 - Hunting - 6.5 CM

Bolt 23/24" - Steel - 243
Bolt 23/24" - Hunting - ?
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body">

thanks for the info! is there any drop tables or reloading data for the 6 Creedmoor yet?

So to summarize the thread so far,

in the gap10 -

*243 is nice, but the loads to fit in the mag are not equal to the 6 or the 6.5 creedmoor.

*6 creedmoor is better for target shooting

*6.5 creedmoor is better for hunting, but still very good for targets


What about if the platform was a bolt gun w/ a 24" barrel? would the recommendations still be the same for the steel or hunting? or would the 243 get more of a consideration due to the bolt gun being able to take a longer COAL? </div></div>

For the 6mm Creedmoor. The drop table looks something like this with a 107 gr bullet at 3000fps. 7 mils to 1000, 6 to 900, 5 to 800, 4 to 700, 3 to 600, 2 to 500. These are the numbers I've seen for it anyway - they look very convenient to me.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sititunga1</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: McCourt Munitions LLC</div><div class="ubbcode-body">In GAP-10 platform you can eliminate the 243 out of the gate, limited to 2.800" OAL either the version of the Creedmoor is a superior choice.
I've seen the 260 mentioned but again, in a GAP-10 with mag constraint of 2.800" the 6.5 Creedmoor is better overall fit then the 260. I'm a 260 guy, though I do have my first 6.5 Creedmoor on the way, but facts are facts. 2.800" max OAL the Creedmoor gives up little to nothing to the 260 from a gasser.

Bolt gun I'd give the nod to a larger case to push the bigger bullets. OP didn't ask about bolt gun, asked about a GAP-10.

Banging steel and punching paper I'd go 6 Creedmoor.

Throw in hunting and suggestion shifts to the 6.5 for the extra energy, larger diameter hole you are going to poke in animal.
</div></div>

thanks for the info! is there any drop tables or reloading data for the 6 Creedmoor yet?

So to summarize the thread so far,

in the gap10 -

*243 is nice, but the loads to fit in the mag are not equal to the 6 or the 6.5 creedmoor.

*6 creedmoor is better for target shooting

*6.5 creedmoor is better for hunting, but still very good for targets


What about if the platform was a bolt gun w/ a 24" barrel? would the recommendations still be the same for the steel or hunting? or would the 243 get more of a consideration due to the bolt gun being able to take a longer COAL? </div></div>

For the 6mm Creedmoor. The drop table looks something like this with a 107 gr bullet at 3000fps. 7 mils to 1000, 6 to 900, 5 to 800, 4 to 700, 3 to 600, 2 to 500. These are the numbers I've seen for it anyway - they look very convenient to me. </div></div>

holy hell. what are the numbers for 243 or 6.5? 7 mils to 1k is amazing.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body">ok so far have I got this correct?

GAP10 - Steel - 6 CM
GAP10 - Hunting - 6.5 CM

Bolt 23/24" - Steel - 243
Bolt 23/24" - Hunting - ? </div></div>

Bolt rifle I'd go 243 across the board of the choices listed.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: McCourt Munitions LLC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Raider1v1</div><div class="ubbcode-body">ok so far have I got this correct?

GAP10 - Steel - 6 CM
GAP10 - Hunting - 6.5 CM

Bolt 23/24" - Steel - 243
Bolt 23/24" - Hunting - ? </div></div>

Bolt rifle I'd go 243 across the board of the choices listed. </div></div>

for a bolt, is there anything you would be able to hunt with a 6.5cm that you couldnt with a 243?

and thanks for all your help so far.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

I went 6.5mm a while back, I'd run a 260 set up for bigger bullets over a 243 if you are going to use rifle for hunting. I've got several reamers for my personal builds with various amounts of freebore depending on bullet I plan on shooting.
Depending on what action you are building on, 6.5 CM gives up little to the 260. Once you can load the 260 long, then it has a clear advantage over the 6.5 CM. If you are building on a Win 70 for example and going to run out of the factory, hinged floor plate magazine you can make a few simple mods to allow a 3.030" OAL. 260, loaded to same pressures, will walk away from the 6.5 CM when pushing the bigger bullets given the abiliity to load 2.900" or longer.

I think the 243 Win for steel/paper is a great comp round and plenty of guys have won matches shooting the 243. I prefer the 260 with 140 JLK or Berger VLDs at 2900+ over the 243 w/115 DTACs at 3100 fps. If you have to take down reactive steel or an animal, the 260 and 6.5 CM both deliver more energy on target at distance. Clearly the 243 w/115s has a strong following and for good reason, it works very well for punching paper and ringing steel.

Most states have a 6mm minimum caliber requirement for big game. I forget who said it first but when it comes to hunting, shoot the biggest gun you can shoot well. Heck, that is just good advice for any shooting you are doing. If you shoot a 243 really, really well and can't shoot a 260 for chit then I'd tell you to shoot the 243. If you have your mind set on a 243, do it and don't worry about it. Pick the best bullet for the match/hunt you are going to/on and practice so you can put bullet where you need to, when you need to. Know the limits of the rifle/ammo and the distance you can put the bullet into vitals of game animal.

 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

Yes pmag 2.835

.243 allows you some error on ukd targets as well. I guessed a target at 720 and hit it when the target was 770 or 750. So a screaming 243 has advantages...but a 115 smacked a 420 yard target and couldn't knock it over.
 
Re: 243 vs 6mm creedmoore vs 6.5 creedmoore in GAP10

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Ouch!!!!</div><div class="ubbcode-body">but a 115 smacked a 420 yard target and couldn't knock it over.</div></div>

Ouch, are you talking about the K&M match? Because I shot that target at least a couple of dozen times and I never ceased to knock it over. Are you sure you were hitting it and not the base?
 
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