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Post by desertdog on May 3, 2017 7:29:57 GMT -8
Hi all,
What can I expect from a 20" barrel for velocity?
Say with 39gr sbk? And what powder?
Thanks
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Post by GLSHOOTER on May 3, 2017 11:12:47 GMT -8
Hi all, What can I expect from a 20" barrel for velocity? Say with 39gr sbk? And what powder? Thanks Never shot a 20" in the PRAC but for some SWAG work from my 24": AA 2460 3600-3650 AA 2200 " AA 2230 " H335 3650-3725 RL 10 3700-3750 X-TERM 3600-3650 TAC 3625-2675 Start with 20 TACTICAL data and move up a small amount. You will be in the sweet spot. Beware of data from Todd Kindler/The Woodchuck Den. Ritch has some that are quite a bit faster per actual chronograph work. Greg |
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Post by desertdog on May 3, 2017 17:50:39 GMT -8
Thanks for the info. Told my wife I wanted to build Another ar
And she said I have black rifle disease?? Lol!!
Thought it be cool to Have one that goes fast!!
A 24" might be more appropriate? i want to use it for coyotes and such?
Might be to heavy at 24"? Need to think some more...
Definitely want 20 practical very easy wildcat like 6x45!!!
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Post by GLSHOOTER on May 3, 2017 18:18:21 GMT -8
Thanks for the info. Told my wife I wanted to build Another ar And she said I have black rifle disease?? Lol!! Thought it be cool to Have one that goes fast!! A 24" might be more appropriate? i want to use it for coyotes and such? Might be to heavy at 24"? Need to think some more... Definitely want 20 practical very easy wildcat like 6x45!!! Get a standard weight 22". No threads if not suppressed in the future. Greg |
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biNg
Junior Member
Posts: 10
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Post by biNg on May 21, 2018 17:35:21 GMT -8
Hi all, What can I expect from a 20" barrel for velocity? Say with 39gr sbk? And what powder? Thanks Desertdog, I noticed this is an older post, but if you’re interested I’ll post what I gathered. I’ve had the pleasure of running tests with both a 20” and 24” barrel in the 20 P. So in addition to what GLSHOOTER said: 20” Benchmark-3645 fps (this is a hot load, I was getting pressure signs of all forms). Ymmv 24” Benchmark-3900 fps (this also was a hot load with all accompanying signs to indicate I hit the max). Ymmv I only ran tests with Benchmark. Also, I don’t run mine at these speeds, I just like to see what the ceiling is when I’m working up my loads. Hope this helps. Chris |
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