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caliber chiose. 260 or 7mm-08

operatorj

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Full Member
Minuteman
May 17, 2009
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Heltonville ,Indiana
Putting together a new rifle and cannt decide on caliber. Thinking a 7mm-08 or 260. Will someday start reloading but for nkw what something i can get off the self ammo for.
 
Re: caliber chiose. 260 or 7mm-08

Match grade 708 ammo doesn't really exist, so by default, you would have to choose 260.
 
Re: caliber chiose. 260 or 7mm-08

.260 ballistics with .308 FGMM consistency + better brass? 6.5CM.
Very consistent, easy to find for around $25 per box, sometimes less. . even right now during the full retard ammo feeding frenzy.

When I was having my own personal .260/6.5CM/6.5L debate, ammo availability and pricing is what steered me quickly towards CM, and I dont regret it for one second.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: m14er</div><div class="ubbcode-body">Or if you reload, go with the 6.5 Creedmoor. </div></div>

Good point... that's exactly what I did. Sold my 260 and have never looked back.
 
Re: caliber chiose. 260 or 7mm-08

Glad to see all the hype for the 6.5 I too have been debating about .260 vs 6.5 and after seeing $25/20 for Match 6.5 hold steady through the panic. I am definitely sold on 6.5
 
Re: caliber chiose. 260 or 7mm-08

Definitely Creedmoor...don't need any more competition for 260 brass, thanks.
 
Re: caliber chiose. 260 or 7mm-08

.260 has better brass (if it matters and you reload)
6.5 Creed if you don't reload/or if you don't mind using HDY brass if you do reload.
The 7/08 has never really peaked my interest, but it's bigger brothers (7mmRM,7WSM,7RSAUM) do for sure.
 
Re: caliber chiose. 260 or 7mm-08

All of them are shooters but, right now getting ammo for the 6.5cm might be a little easier(Hornady has a very good load. I have not loaded for the CM yet but the other two are pretty friendly. Not sure what your using it for but, if you want it for a little hunting the CM might be a little light. I know this isn't much help but it would be a tough choice if your just ringing steele, the CM is an awesome shooter.
 
Re: caliber chiose. 260 or 7mm-08

Nevr thought about the 6. 5CM. Dont know much about it. My local shop carries 708 and the owner is a big fan and i have read good things about it. The rifle will be used for some coyote hunting and steel. Maybe one day a out west tripe for deer or elk.
 
Re: caliber chiose. 260 or 7mm-08

Not that one gun won't kill both a yote and an elk but, it sounds like you need two guns. Maybe a 223 for yotes and targets and pick up something bigger when you go for that elk. Still nothing wrong with your original choices. You could load light bullets in that 7mm-08 for yotes and then some 160 or heavier for deer or elk. Glad I'm not looking to cover those bases with one gun.
 
Re: caliber chiose. 260 or 7mm-08

There's not a game animal in North America that a 260/6.5 Creedmoor or 7-08 can't kill just as dead as any 30cal with similar or even greater case capacity...
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: operator j</div><div class="ubbcode-body">Nevr thought about the 6. 5CM. Dont know much about it. My local shop carries 708 and the owner is a big fan and i have read good things about it. The rifle will be used for some coyote hunting and steel. Maybe one day a out west tripe for deer or elk. </div></div>

If quality, accurate 708 ammo is available to you, it's worth considering.

In a nutshell:

6.5CM = .260 (it's really 6 of one, 1/2 dozen of the other)

Between 260 and 708, with typical bullets, the 260 is a bit flatter, while the 708 drifts a bit less. By a "bit", I mean a little bit. It makes very little difference at 1000 yards. If a super-premium top notch bullet, such as the Berger 140gr Target Hybrid is used in the 260, it will actually outperform the 708 in terms of number-crunching. Again though, in the real world, the difference between them at even 1000 yards is SMALL.

The 260 will have noticeably less recoil, and the barrel will wear out noticeably faster, all other things being equal.

Either will handle steel, coyotes or elk just fine, though both are serious overkill for coyotes.
 
Re: caliber chiose. 260 or 7mm-08

I agree shot placement is everything but, I've made a bad shot or two and had to do a little tracking.
 
Re: caliber chiose. 260 or 7mm-08

I'm having a build done right now and I went with a 7-08. Lots of. 308 brass that can be necked down for reloading, better ballistics than. 308, and less recoil..
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gmg</div><div class="ubbcode-body">I'm having a build done right now and I went with a 7-08. Lots of. 308 brass that can be necked down for reloading, better ballistics than. 308, and <span style="font-weight: bold">less recoil</span>.. </div></div>

Disagree.

Recoil is the reaction of the bullet's momentum. Momentum = mass * velocity

308: 175gr * 2650fps = 464000 (gr*fps)

708: 162gr * 2800fps = 455000 (gr*fps)

Not an appreciable difference.

For comparison sake:

260: 140gr * 2850fps = 400000

243: 115gr * 3100fps = 355000
 
Re: caliber chiose. 260 or 7mm-08

Ok, lots of valid points in this thread. If your going to hand load and want the absolute best of the 6.5 and 7 worlds rolled into one I'm going to highly recommend you entertain going with a 7 Creedmoor. I would also work my brass up from 308 Lapua small primmer Palma brass. Do a quick search and you will find some recent threads on it.
 
Re: caliber chiose. 260 or 7mm-08

For those concerned about using "only Hornady brass" for reloading vs. being able to get Lapua brass for the 260.

Here's my 6.5 CM using Hornady brass, the barrel hadn't been cleaned for near 1000rd and this was shot off an LRA bipod w/ a rear bag from 100yd. That's a 5 shot group that measures 0.43", take off the bullet diameter and you're in the mid teens.

IMG_20110925_162803.jpg


We're not playing the short range BR game here, that's a field rifle off a bipod.

Here's a CBS I hit this summer with the 140 Amax factory ammo at 637yd

2012-08-20_18-00-25_72.jpg


This is the last barrel, the new one shoots just as nicely with 140 Amax and 140 Match Hornady.

~22" barrel throwing 140 class at 2820fps.

A buddy of mine shot a 310-class bull elk with a 6.5C at 480yd in MT last year. Single shot with factory Amax ammo. The animal dropped where it stood. He got a cow later that week from 630yd, again with factory 140 Amax ammo out of his SAC built 22" 65CM.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: operator j</div><div class="ubbcode-body">Putting together a new rifle and cannt decide on caliber. Thinking a 7mm-08 or 260. Will someday start reloading but for nkw what something i can get off the self ammo for. </div></div>

Since I have a 708 and going on my 2nd 6mm Creedmoor Id go for the 6.5 Creed.
 
Re: caliber chiose. 260 or 7mm-08

A rifle isn't much good without ammo. Get your supply of ammo first and build your rifle around that. Or jump into reloading NOW by making your own supply of ammo. If you're lucky, you'll still be able to choose your caliber. Wait much longer and you won't be able to find a reliable supply of anything to build a rifle around.
 
Re: caliber chiose. 260 or 7mm-08

I have used the 6.5 AMAX bullet with excellent success on our smallish Western whitetails but elk? That is stretching a match bullet a bit too far for my taste. Elk are large tough animals that need a bullet designed for hunting. Even then, a 6.5 is pushing your luck IMO.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LRJammer</div><div class="ubbcode-body">I have used the 6.5 AMAX bullet with excellent success on our smallish Western whitetails but elk? That is stretching a match bullet a bit too far for my taste. Elk are large tough animals that need a bullet designed for hunting. Even then, a 6.5 is pushing your luck IMO. </div></div>

That's why it's opinion but the results are tough to argue with. I'd shoot an elk with one at reasonable distances. The Swedes have been shooting Moose with 140-160gr bullets from 6.5x55's with low pressure ammo for almost 120 years and bragging about how incredibly reliable it is.

The 6.5CM at modern pressures outperforms the antique 6.5 Swede ammo handily.

You can shoot an elk with a 50BMG and screw it up. Rely on the shooter not the rifle.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: operator j</div><div class="ubbcode-body">The 6.5 CM has kinda perked my interest. What is the shortest barrel length you would suggest. </div></div>

All depends what you're going to d with it, target work id go 28", Yote hunting maybe 24-26.
Im kind of a long barrel guy, both my 6 Creeds are going to be 28".
 
Re: caliber chiose. 260 or 7mm-08

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

~22" barrel throwing 140 class at 2820fps.

</div></div>

I have a build going on right now that is 24" but I'd love to drop another 2", the factory Hornady stuff says it is ~2710fps out of a 24". You are talking reloads here yes? What's the recipe and how are your primer pockets holding up with the Hornady brass?
 
Re: caliber chiose. 260 or 7mm-08

Here's a data point:

260 Remington

43.6gr H4350, 140hpbt hornady, RP brass, 2.830" COAL

2800 fps

21.5" (recoil lug to crown) Bartlein

Here's another:

7-08 Remington

45.5gr H4350, 162gr amax, necked 308 FC brass, 2.840" COAL

2785fps

25" (recoil lug to crown) CBI/Criterion
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 117D-RTO</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body">

~22" barrel throwing 140 class at 2820fps.

</div></div>

I have a build going on right now that is 24" but I'd love to drop another 2", the factory Hornady stuff says it is ~2710fps out of a 24". You are talking reloads here yes? What's the recipe and how are your primer pockets holding up with the Hornady brass? </div></div>


I've lost count how many times I've reloaded this brass. I'm 2300+ through my second barrel, first batch of ~350 pcs of brass.

140 Amax @ 2.82
43.5gr H4350

140 Hornady Match @ 2.78
43.5gr H4350
 
Re: caliber chiose. 260 or 7mm-08

I have both the 260 and the 6.5 Creed and like them both. The Creed is a LMT MWS with a 20" tube and the 260 is a bolt with a 24" tube. I get a little better velocities out of the 260 only because of the barrel lenght. Hornady is not the only brass for the Creed though, you can make it out of any 308, 708, 243 30TC or anything similar. It is a little work but not that hard. So everyone that says choose this because of whatever somtimes you just need to think out side the box!
 
Re: caliber chiose. 260 or 7mm-08

6.5. Whether .260, 6.5 cm, 6.5x47. Can argue pros and cons of these three til the cows come home. Bottom line launching 140 gr pills 2700-2800 fps. Low recoil, relatively high BC for bullet mass, reasonable barrel life. What's not to like? Unless you don't reload, in which case you can go with 6.5 cm.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tonytx</div><div class="ubbcode-body">I have both the 260 and the 6.5 Creed and like them both. The Creed is a LMT MWS with a 20" tube and the 260 is a bolt with a 24" tube. I get a little better velocities out of the 260 only because of the barrel lenght. Hornady is not the only brass for the Creed though, you can make it out of any 308, 708, 243 30TC or anything similar. It is a little work but not that hard. So everyone that says choose this because of whatever somtimes you just need to think out side the box! </div></div>
Just tried some 308 brass to make 6 Creed, didnt turn out too well, one had a badly dimpled shoulder the other the body collapsed just under the shoulder.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JGorski</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tonytx</div><div class="ubbcode-body">I have both the 260 and the 6.5 Creed and like them both. The Creed is a LMT MWS with a 20" tube and the 260 is a bolt with a 24" tube. I get a little better velocities out of the 260 only because of the barrel lenght. Hornady is not the only brass for the Creed though, you can make it out of any 308, 708, 243 30TC or anything similar. It is a little work but not that hard. So everyone that says choose this because of whatever somtimes you just need to think out side the box! </div></div>
Just tried some 308 brass to make 6 Creed, didnt turn out too well, one had a badly dimpled shoulder the other the body collapsed just under the shoulder. </div></div>

I run it through a body size die in 1 shot. Badly dimpled was the first one, I had waaaaay too much lube on it. It did fire right out, but it wasn't pristine coming through on the first shot.

The rest I dialed back how much sizing wax I put on there and it handled the job in 1 shot on my old RockChucker.

Sounds like too much lube and not enough lube. You can also try to avoid doing anything major to the neck and run it slow. Good luck with it. Hit me up via PM if you have any more questions and I'll see what I can do to help.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JGorski</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tonytx</div><div class="ubbcode-body">I have both the 260 and the 6.5 Creed and like them both. The Creed is a LMT MWS with a 20" tube and the 260 is a bolt with a 24" tube. I get a little better velocities out of the 260 only because of the barrel lenght. Hornady is not the only brass for the Creed though, you can make it out of any 308, 708, 243 30TC or anything similar. It is a little work but not that hard. So everyone that says choose this because of whatever somtimes you just need to think out side the box! </div></div>
Just tried some 308 brass to make 6 Creed, didnt turn out too well, one had a badly dimpled shoulder the other the body collapsed just under the shoulder. </div></div>

I run it through a body size die in 1 shot. Badly dimpled was the first one, I had waaaaay too much lube on it. It did fire right out, but it wasn't pristine coming through on the first shot.

The rest I dialed back how much sizing wax I put on there and it handled the job in 1 shot on my old RockChucker.

Sounds like too much lube and not enough lube. You can also try to avoid doing anything major to the neck and run it slow. Good luck with it. Hit me up via PM if you have any more questions and I'll see what I can do to help. </div></div>
I used just the right amount of lube, Hornadys Unique, great stuff!
The first 308 brass I ran thru the NS only Custom Hornady die and noticed a donut I guess youd call it on the body shoulder juncture was sticking out a bit so I then ran it thru the FL Custom die, 2nd pc was all FL die. Maybe Ill take a pic.
 
Re: caliber chiose. 260 or 7mm-08

I love the 7-08, it does very well when paired with the 162gr. Amax and is a great hunting round with bullets in the 140gr. range, plus I am a huge fan of anything 7mm.
 
Re: caliber chiose. 260 or 7mm-08

Left to right, 22-250 fireformed to make 6 Creed, 308 case sized in 6 creed NS die, 243 sized in same die, 308 sized in NS and FL custom die, last 2 308s were sized in NS die.
IMG_0865_zpseafb84b2.jpg
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JGorski</div><div class="ubbcode-body">Left to right, 22-250 fireformed to make 6 Creed, 308 case sized in 6 creed NS die, 243 sized in same die, 308 sized in NS and FL custom die, last 2 308s were sized in NS die.
IMG_0865_zpseafb84b2.jpg
</div></div>

3rd from the right looks just like the one I had on the first try. Less lube and those dents went away on the next try. Were the dents full of lube?

I haven't used the Hornady stuff, I've been using the Redding sizing wax for a few years. I tried a few of the water based ones, one shot aerosol stuff and ended up having the best results from the Redding. I know not everyone likes it, I'm use to it, it works well for me so I stick to it.

The shoulders on there are kinda goofy, the only time I've done that is when I screwed up a 7WSM die and had the sizer ball in a Forster die adjusted incorrectly. Not sure what to tell you there.
 
Re: caliber chiose. 260 or 7mm-08

I really didnt have much lube on any of these cases,didnt lube the shoulder so there was no lube in the dents, in fact when I used the NS only die there wasnt any lube on the cases cuz it dont need lube for neck sizing.
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Scotch egg</div><div class="ubbcode-body">Run the .308 brass through a 7-08 die before the creed die. </div></div>

Take it down in baby steps like ^^^^ and it should help out.
 
Re: caliber chiose. 260 or 7mm-08

I have a Browns Precision 708 and love it, no kick at all, i do reload, and she has taken an elk or two in her day. You can kill just about anything around here with it, its all shot placement. I have other caliber rigs but this is just one I enjoy. Good luck and you cant go wrong with any of your choices.

-Marc
 
Re: caliber chiose. 260 or 7mm-08

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Scotch egg</div><div class="ubbcode-body">Run the .308 brass through a 7-08 die before the creed die. </div></div>

How is that going to prevent the body from collapsing?
 
Re: caliber chiose. 260 or 7mm-08

First, I haven't tried changing brass casings from one caliber to another.
But, from what I have read, the theory of using several dies to go from one casing size to another is that you choose one or more intermediate sizes so that you only stress the brass a little at a time. In so doing, you are much more likely to obtain the desired results than if you try to do it all at once. If you try too much at once, you run the risk of the metal moving unevenly, and thus creating dimples or rings. The rings would indicate that the shoulder was being pushed to far too fast, and the lower case was not strong enough to handle the pressure, so it wrinkled, forming a ring. This could also explain the dimples in the other, as the case held up, but the shoulder metal wouldn't flow properly, so it dimpled.
Another possible reason could be that the brass you tried to form was not the proper hardness for what you were doing, (my guess is too soft), so it buckled in areas that you didn't want it to.
Again, I don't have practical experience here, so what I am saying is book knowledge.
I would appreciate if those who do have experience could weigh in to help me know if I am learning correctly here.
 
Re: caliber chiose. 260 or 7mm-08

Guys-

Most of the above discussion is assuming the 162gr Amax at ~2800 from the 7-08 (or 7CM). Ballistically that bullet's BC and MV look a lot like the 140gr at 2850 from the med. 6.5mm cartridges. No point in taking the extra recoil to duplicate the external ballistics (unless you need terminal performance, either for hunting and/or seeing bullet splash or think the increased barrel life is more valuable).

But how about the excellent 175gr 7mm SMK? With that bullet, you are starting to talk about a meaningful difference in BCs, in favor of the 7mm. What MV can the 7-08/7CM launch the 175gr SMK at from a tactical length barrel (26-28")????
 
Re: caliber chiose. 260 or 7mm-08

In the data that I have access to, I am seeing 2500-2600 FPS for the Sierra (Match King?) 175gr from a 26" barrel, depending on powder used. That is in the 7-08 cartridge size.
I entered a 28" barrel, and used the Reloader 19, which was 2600 FPS on the original load, and the estimate is that it should be 2582-2682 FPS, or 2632 FPS average.