6mm Comp Rifles

[wnroscoe]

With the 6mm craze of late I'm curious as to your experiences with any of the following. 6mm Competition Match, 6mm Super X, 6mm Super Long Range, 6-6.5x47 Lapua.

After several hundred rounds of testing in my 6XC, suppressed and un-suppressed, I've found with that particular rifle that 2,860 fps with the 105 Berger Hybrids is about it if accuracy is what I'm looking for. The rifle will hit 3,050 with ease but accuracy falls off too bad.

I'm looking for 3,050 min. to 3,100 fps max with less than .5 moa accuracy with the 105 Hybrids.

If you have one of the above cartridges please chime in. I'm all ears to see if there’s really a nickel's worth of difference between any of them.

 

[buffybuster]

Re: 6mm Comp Rifles

I've got a wildcat similar to the 6SuperLR. From a 25" barrel shooting 107SMK's, I get 3070fps from 41.3gr H100V with sub 1/2moa groups and 3160fps from 41.8grs H100V also with sub 1/2moa (better than 41.3grs). No pressure, one finger bolt lift, no case growth.

 

[Scotch_egg]

Re: 6mm Comp Rifles

This topic interests me, will a 6mm beat a 6.5?


are you talking 26" barrel? This could greatly affect the ballistics comparison.

 

[wnroscoe]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Scotch egg</div><div class="ubbcode-body">This topic interests me, will a 6mm beat a 6.5? </div></div>

Yes, 26"

Like all else, at the end of the day, it boils down to the driver. I've been shooting a 260 for awhile now and have no complaints. The 6.5 Super Long Range looks great and I'm sure it'll do wonders with a 139/140/142 but, the 6mm is calling to me.............listen, dont you hear it

 

[Rob01]

Re: 6mm Comp Rifles

Don't count out the good old .243. Not hip and new with buzz words words in the title but it still does the job.

 

[Engine 22]

Re: 6mm Comp Rifles

Why not the good ole .243? A guy could easily reach 3000 with the 105s I would think.

 

[B.Bates]

Re: 6mm Comp Rifles

Out of those I would get a 6-6.5x47

Amazing brass.

No fireforming. Probably not a cconcern to you as you can make a forming barrel but still takes time powder n bullets. Plus I like to grab load and shoot

I think a straight 243 is worth considering. 3050 fps easy. Great brass

Why worry about barrel life in your position

 

[Dustin Morris]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shootone</div><div class="ubbcode-body">Out of those I would get a 6-6.5x47

Amazing brass.

No fireforming. Probably not a cconcern to you as you can make a forming barrel but still takes time powder n bullets. Plus I like to grab load and shoot

I think a straight 243 is worth considering. 3050 fps easy. Great brass

Why worry about barrel life in your position </div></div>

Rest assured he's not worried about barrel life. I think he's concerned mainly with having an accuracy node between 3050 and 3100 so that he can be legal in these comps that have a 3100fps speed limit.

Dustin

 

[wnroscoe]

Re: 6mm Comp Rifles

Yes, the 243 is more than a sound cartridge. Dustin Morris's brother Patrick Morris shot a 243 I built for the better part of a year with 115's & H1000 at 2,950 fps. That’s a pretty strong combo when going long no doubt. I hear people hated that rifle

Barrel life concern.......whets that?

Fire form barrel, no thanks. Been there done that (6 Dasher)

Velocity cap at comps, bingo, we have a winner. 3,100 fps max

The 243 will more than deliver, that’s my dilemma, it'll deliver more than 3,100 fps with the 105 Hybrids and all I have is a 1-8 twist 5r Bartlein. Ordering a 1-7.5 or 1-7.8 would add time to my equation. I've read the testing data that when using 30 degree shoulders with longer necks and slower powders throat erosion and torching is slowed considerably and barrel life is in excess of 2,000 rounds.

I don’t know if all that makes that big of a difference. My 6BR was toast after 2,500 rounds and all it saw was either 30.2 grains of N140 or 30.3 grains of Varget, CCI450's and Berger 105 VLD's. When the BR went, it went from .0-.1 to .4/.5 during a string of fire during a match

 

[toddconley]

Re: 6mm Comp Rifles

Do you build gas guns? If so I would be interested to talk to you about a project I have in mind. You seem to be on the same page a me. Could you pm me if so
Thanks
T

 

[shoepop]

Re: 6mm Comp Rifles

Not sure what the problem is with your 6xc it should shoot well. I have a TRG with a Bartlein 1/7.5 26" and it will shoot 115 DTAC or Bergers @ 3025 fps and hold 1/2" moa to 600 and 3/4 to 1000 all day with decent wind. It will also do same faster with 107 smk's. I shoot suppressed and if anything it just gets better. A big + is it magazine feeds 100%.

 

[gme]

Re: 6mm Comp Rifles

I had a 6 mm Remington that would easily do all that and more, longer neck and steeper shoulder angle than the 243, no fireforming either, might have trouble getting it to work in a short action though.

 

[Brandon05_88]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">Don't count out the good old .243. Not hip and new with buzz words words in the title but it still does the job.</div></div>
.243 Win....Build it and they will come. I've got 1000 DTACs, 300 Lapua cases prepped, H4350 and H4831 waiting for when you send the Surgeon 591 with 7.5 twist Bartlein 5R my way. After she's broken in, she's going for melonite. Then, I'm gonna run the same loads to check for velocity. There's only one way to find out how it's gonna work.

 

[5RWill]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">Don't count out the good old .243. Not hip and new with buzz words words in the title but it still does the job.</div></div>

Agreed, was about to add it.

I have some 105gr VLDs i just loaded in a 18" youth rifle hehe best load turned out to be max will be interesting to see what velocity i get.

 

[Cegorach]

Re: 6mm Comp Rifles

+1 on .243

I have had fantastic luck with the 115's and H1000 at a little less than 3,000 fps. It couldn't feed better, has lots of brass options, and just seems to work well all around.

When this barrel is gone the other option I might consider is the 6mm creedmoor, especially if brass is made for it like it sounds like might happen.

 

[TRG4ME]

Re: 6mm Comp Rifles

Hi guys I'm a little off topic maybe you can help me out.I have a sako trg 22 and i wanted to rebarrel it, can you suggest a accurate round for 500 yards .I love to shoot but rarely get a chance to, when i get a chance i go thru 300-500 rnds. I don't reload so im looking for a accurate least expensive match ammo to out preform the .308 at 500yards ,, any suggestions i would greatly appreciate thanx. Im mostly shooting paper at 500 yards .

 

[Rob01]

Re: 6mm Comp Rifles

You don't have to push the .243 super hard. I will be using a 8.5 twist for the 105 bthp and will easily get in the 3050-3100 range so I can run it in matches.

I like the .243 because I don't have to worry about losing expensive or fire formed brass at matches.

 

[Jeffvn]

Re: 6mm Comp Rifles

I have and shoot the 6x47L, but run it at only 2,920 fps with a truly one hole accuracy load with DTAC 115s.

I bought 243 brass and dies for a 6SLR last year, but have not built it out yet. No forming other than running the brass through the sizing die. If Robert's load and velocity data proves correct (up to this point he is dead on in his predictions) the 6SLR will run a hammer load for DTAC 115s at 3,000 - 3,100 fps.

Jeffvn

 

[LRI]

Re: 6mm Comp Rifles

6mm Competition Match:

Parent case: 243 Winchester.
Application/use: NRA Highpower Course shooting & Longrange any/any

The idea/scope of the cartridge:

Intnded to offer a high performance alternative for those who consume a large quantity of ammunition. Cooler chamber temps via use of slow burning magnum powders help mititgate throat erosion. Ease of case preparation with a single fireform process.

With a 27" barrel we've had reports as high as 3150fps out of 107 weight bullets.



Performance as reported by my clients:


John L. from Michigan: NRA High Master card awarded shortly after switching to the 6mmCM. X counts are in the 65% range and scores never seem to drop below the 197/200 mark. John shoots iron sight 600/1000 yard prone matches.

David D. from Nevada:

Responded by telling me his 6mmCM has 8 minutes less elevation and holds 9 inches inside a 6.5 Creedmoor. He shot the creedmoor for a long time prior to giving this a whirl. Velocity according to his chrony is 3150fps with the heavy stuff.

This is what we've been hearing back from folks. Seems to work and with a 3000+ round count potential its nice to be able to leave a barrel on a gun longer.

C.

 

[buffybuster]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TRG4ME</div><div class="ubbcode-body">Hi guys I'm a little off topic maybe you can help me out.I have a sako trg 22 and i wanted to rebarrel it, can you suggest a accurate round for 500 yards .I love to shoot but rarely get a chance to, when i get a chance i go thru 300-500 rnds. I don't reload so im looking for a accurate least expensive match ammo to out preform the .308 at 500yards ,, any suggestions i would greatly appreciate thanx. Im mostly shooting paper at 500 yards .

</div></div>

Inside 500yds, there's nothing wrong with a .308Win. But if you want to upgrade without reloading a 6.5Creedmoor would be a good pick. Reasonably priced Hornady match ammo. If you have more $$$ then 6.5x47Lapua and you're left with better brass, for when you do decide to reload.

 

[vonbalkenbush]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">6mm Competition Match:

Parent case: 243 Winchester.
Application/use: NRA Highpower Course shooting & Longrange any/any

The idea/scope of the cartridge:

Intnded to offer a high performance alternative for those who consume a large quantity of ammunition. Cooler chamber temps via use of slow burning magnum powders help mititgate throat erosion. Ease of case preparation with a single fireform process.

With a 27" barrel we've had reports as high as 3150fps out of 107 weight bullets.



Performance as reported by my clients:


John L. from Michigan: NRA High Master card awarded shortly after switching to the 6mmCM. X counts are in the 65% range and scores never seem to drop below the 197/200 mark. John shoots iron sight 600/1000 yard prone matches.

David D. from Nevada:

Responded by telling me his 6mmCM has 8 minutes less elevation and holds 9 inches inside a 6.5 Creedmoor. He shot the creedmoor for a long time prior to giving this a whirl. Velocity according to his chrony is 3150fps with the heavy stuff.

This is what we've been hearing back from folks. Seems to work and with a 3000+ round count potential its nice to be able to leave a barrel on a gun longer.

C.

</div></div>

I find the 6mm trend in tactical competition fascinating. Especially with all these new 6mm wildcats coming out that are doing nothing more than re-inventing the wheel. David Tubb went through all the trial and error of developing a superb 6mm cartridge 10 years ago with the 6XC. Excellent brass, 30 degree shoulder, long case neck, enough case capacity to get 3100fps from 115 DTAC, very good barrel life and was designed from the get-go to feed reliably from a detachable mag. It seems the tac community is finally starting to realize what the high-power and benchrest community figured out 10 years ago. The 6mm is the way to go.

Norma just debuted their first factory ammo offering (Diamond Line) for the 6XC at the SHOT Show this week. It seems like a no brainer to me. I'll be finishing up my second 6XC in couple of months

. Just my 2 cents...

-SBS

 

[Papagallos]

Re: 6mm Comp Rifles

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wnroscoe</div><div class="ubbcode-body">With the 6mm craze of late I'm curious as to your experiences with any of the following. 6mm Competition Match, 6mm Super X, 6mm Super Long Range, 6-6.5x47 Lapua.

After several hundred rounds of testing in my 6XC, suppressed and un-suppressed, I've found with that particular rifle that 2,860 fps with the 105 Berger Hybrids is about it if accuracy is what I'm looking for. The rifle will hit 3,050 with ease but accuracy falls off too bad.

I'm looking for 3,050 min. to 3,100 fps max with less than .5 moa accuracy with the 105 Hybrids.

If you have one of the above cartridges please chime in. I'm all ears to see if there’s really a nickel's worth of difference between any of them.
</div></div>

What's your experience with the 115 DTACs, if any? Or did you just prefer to run the 105s exclusively?

 

[shoepop]

Re: 6mm Comp Rifles

I have tested and continue the 105 Hybrids in my xc and not ready to swallow the kool aid yet. Going to give them one more go and if they don't produce adios, there are plenty of other great bullets out there that do.

 

[car2go4]

Re: 6mm Comp Rifles

btt - for a good thread