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6.8 Twist?
#3310523
06/21/12 09:16 AM
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Joined: Jan 2011
Posts: 803
sbvx67
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Ok guys I'm starting to put together funds for my 6.8 upper build. I want to shoot big mean armored mutant pigs and see them fall where they are. I went thru this same dilema when I bought my 5.56 upper.What twist do I want? With the 5.56 I went to the 1 in 7 and have been blown away with the accuracy improvement over the 1 in 9 that I started out with. Does the 6.8 go the same way? Tighter twist = bigger bullets and better accuracy? Forgive me if I am waking a dead horse. But I want to do this only once. Thank you for any info and opinions shared.
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Re: 6.8 Twist?
[Re: sbvx67]
#3310806
06/21/12 01:39 PM
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Joined: Feb 2009
Posts: 2,856
30378
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With the 6.8SPC anything over 130gr will take up too much case powder capacity from required seating depth to make magazine length. Staying under 130gr a 1x11 or 1x12 twist will be optimum. Mine has a 1x11 twist and shoots 115 grainers really well.
NRA Benefactor Life Member - Free men should not be subjected to permits, paperwork and taxation in order to carry a firearm.
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Re: 6.8 Twist?
[Re: 30378]
#3310994
06/21/12 02:52 PM
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Joined: Nov 2004
Posts: 44,585
RKHarm24
sergeant
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sergeant
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The 6.8 The 6.8X43 was developed as an improved CQB cartridge by the 5th Group Special Forces, it is now very popular with hog hunters because of the devastating performance combined with the AR15 platform. It has apx 80% of the performance of the 308 in a much lighter platform. We have designed a 5 groove hybrid rifling similar to 5R with a low land to groove ratio to increase the bore area and lessen bullet deformation which leads to better accuracy, we have found that our 5R Melonite QPQ and S Carb. QPQ barrels consistently produce 60-90fps more than most SPCII 10 and 11 twist 4 groove barrels with the same loads. Hornady's 110gr HPBTs reach 2600fps from our 16" barrels and normally shoot under 3/4" groups at 100yds, with better shooters groups are 1/2" so they shoot better than some high dollar stainless barrels and most match grade 5.56s . Hornady's 120gr SST works very well on deer and hogs. With handloads it is possible to push a 100gr Nosler to 3000fps from a 16" barrel, nothing else with a 16" barrels comes close to the performance of a 6.8. The Melonite(QPQ) treated barrels we sell will last twice as long as stainless barrels and the final finish meets or exceeds stainless steel corrosion resistance. The 6.8SPCII and 6.8x43 use the same ammo including SSAs Tac loads and Wilson Combats ammo uses the same size dies, only the throat in the chamber is different.
16" Scout profile 6.8 barrels-4150 Melonite, hi perf cham, 11.25 twist 5R rifling http://www.ar15performance.com/
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Re: 6.8 Twist?
[Re: 30378]
#3311072
06/21/12 03:21 PM
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Joined: Dec 2008
Posts: 41,253
J.G.
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With the 6.8SPC anything over 130gr will take up too much case powder capacity from required seating depth to make magazine length. Staying under 130gr a 1x11 or 1x12 twist will be optimum. Mine has a 1x11 twist and shoots 115 grainers really well. Man that seems to know what he's talking about. Bet this is your answer.
800 Yard Steel Range Precision Rifle Instruction Memberships and Classes Available
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Re: 6.8 Twist?
[Re: 30378]
#3311236
06/21/12 04:23 PM
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Joined: Nov 2008
Posts: 9,952
LFD2037
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With the 6.8SPC anything over 130gr will take up too much case powder capacity from required seating depth to make magazine length. Staying under 130gr a 1x11 or 1x12 twist will be optimum. Mine has a 1x11 twist and shoots 115 grainers really well. The game has recently changed!!!! http://www.ssarmory.com/6.8_spc_ammo_140gr_vld_berger.aspxI say 1:11.
R.I.P. CPO Matt Mills-(DEVGRU)- You will NEVER be forgotten! 10-25-75 / 8-6-11 *K.I.A.*
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Re: 6.8 Twist?
[Re: LFD2037]
#3312132
06/21/12 11:15 PM
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Joined: Jul 2006
Posts: 14,278
Fooshman
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Re: 6.8 Twist?
[Re: Fooshman]
#3312275
06/22/12 12:12 AM
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Joined: Apr 2009
Posts: 6,508
jkmccoy11
THF Trophy Hunter
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McCoy
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Re: 6.8 Twist?
[Re: jkmccoy11]
#3312434
06/22/12 01:00 AM
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Joined: Jan 2011
Posts: 803
sbvx67
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Thanks a bunch guys I appreciate you sharing your knowledge.
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Re: 6.8 Twist?
[Re: sbvx67]
#3312471
06/22/12 01:13 AM
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Joined: Jan 2011
Posts: 803
sbvx67
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Posts: 803 |
Ok looking at a Wilson Combat fluted with a 1-11 twist. Think that will be a good choice? I'm thinking that a .25 difference probably won't make that much difference.And I think that Wilson is top notch stuff. What do you guys think?
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Re: 6.8 Twist?
[Re: sbvx67]
#3312481
06/22/12 01:15 AM
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Joined: Nov 2008
Posts: 9,952
LFD2037
THF Trophy Hunter
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THF Trophy Hunter
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Posts: 9,952 |
I believe all 11 twists are 11.25. From what I've seen that's been the case.
R.I.P. CPO Matt Mills-(DEVGRU)- You will NEVER be forgotten! 10-25-75 / 8-6-11 *K.I.A.*
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Re: 6.8 Twist?
[Re: sbvx67]
#3312508
06/22/12 01:22 AM
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Joined: Sep 2009
Posts: 4,759
ccoker
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Ok looking at a Wilson Combat fluted with a 1-11 twist. Think that will be a good choice? I'm thinking that a .25 difference probably won't make that much difference.And I think that Wilson is top notch stuff. What do you guys think? I have owned 2 uppers from ARP and 2 from Wilson Combat all good stuff Review: http://tacticalgunreview.com/blog/2011/08/wilson-combat-6-8-review/update since the pic was taken, switched to the 16" lightweight barrel
Last edited by ccoker; 06/22/12 01:30 AM.
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Re: 6.8 Twist?
[Re: ccoker]
#3312626
06/22/12 01:57 AM
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Joined: Jan 2011
Posts: 803
sbvx67
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Posts: 803 |
Very nice! I want to see pics of what it has killed! Got any? What kind of light is that and how do you like it?
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