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barrel twist rate, ar15 ? |
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shooter07
Optics Jedi Knight Shooting Sprout Joined: June/12/2010 Location: PA Status: Offline Points: 5120 |
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Have you checked out the 1-8 twist barrels? I've found some damn good results with a wider range of grain sizes. |
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Si Vis Pacem Para Bellum
"Issac Newton invented gravity because some asshole hit him with an apple" -Chris Moltisanti |
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shooter07
Optics Jedi Knight Shooting Sprout Joined: June/12/2010 Location: PA Status: Offline Points: 5120 |
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Hit them in the head and they won't get back to the hole Easier said then done of course. |
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Si Vis Pacem Para Bellum
"Issac Newton invented gravity because some asshole hit him with an apple" -Chris Moltisanti |
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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So far so good. I just recently tried that bullet it Hornady's Superformance ammo and it seemed to stay accurate out to 500 yards. Now, I will try to put some handloads together and see how accurate I can make it. ILya
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cheaptrick
MODERATOR Joined: September/27/2004 Location: South Carolina Status: Offline Points: 20844 |
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How accurate is accurate, K?
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jjrgr21
Optics Journeyman Joined: January/10/2011 Status: Offline Points: 368 |
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yeah hitting GH's in the head with 16" ar at 300+. most are juvies so they only give you about 1 second up and 8 down. little bastards
i have some 60 vmax that do real good at 200, but start to peter off past 250 thats why i stuck with the 68/75's |
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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That depends. This particular AR shoots about 0.75 to 0.9 MOA with handloaded 77gr SMKs. With factory 53gr Vmax it averaged right around 1 to 1.2 MOA. I think I can tighten the 77gr SMKs a touch down to consistent 0.75 MOA or better and I think I can bring my 53gr handloads down below 1MOA as well. How far away I can keep that accuracy is not clear, since the range where I shoot usually has a fair amount of wind. 53gr Vmax and 77gr SMKs seem to have about the same wind drift out to 500 yards or so, which is about all I want out of a 223 under normal circumstances. My other AR is chambered for 6.5Grendel and is showing much better accuracy potential. With 123gr SMKs it averages in the 0.5 - 0.7 MOA range. It may be capable of doing better, but I do not think I am capable of shooting that well with any consistency. ILya
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jjrgr21
Optics Journeyman Joined: January/10/2011 Status: Offline Points: 368 |
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if the 53 and 77 have similar WD out to 500 thats crazy good.
i found that i get better groups with cci400 than with remington BR primers. with the 60 vmax it was a huge difference, around 2" better with the 400's |
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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53gr V-max have pretty sleek profile. Hornady lists their BC as higher than both 55gr and 60gr Vmaxes. Since they start out quite a bit faster than 77 grainers, it is not surprising that out to 500 yards they still buck wind petty well. Beyond that a heavier bullet would do better. ILya
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jjrgr21
Optics Journeyman Joined: January/10/2011 Status: Offline Points: 368 |
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i'll pick some up start working on them
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Sgtshultzy266
Optics GrassHopper Joined: November/03/2006 Location: United States Status: Offline Points: 24 |
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I have a RockRiver predator pursuit 1/8 that shoots everything Ive put thru it well, anywhere from 45gt to 77gr guess I got a good one.
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