20ppc

Dale264

Sergeant of the Hide
Full Member
Minuteman
Jun 22, 2018
128
70
Eye-oh-wah
Does anyone have any experience with an AR15 in 20ppc, 20lbc, 20grendel, or 20ARC? If so, where did you get your barrel? I have no interest in the 20practical/tactical or 204 ruger.
 
I’ve looked into this, basically what I have gathered is that if the case is short it will not chamber reliably. Hence why the 223 case is used as a minimum with the short20 cal bullets.
 
What are you wanting with those cases? More velocity? Redding Makes 20 Nosler dies so somebody has a reamer.
I'm wanting something a bit different. This case holds about 3gr more powder compared to a 204ruger from what I've seen. I'm looking for the best performance out of a 20cal in an Ar15 platform.
I’ve looked into this, basically what I have gathered is that if the case is short it will not chamber reliably. Hence why the 223 case is used as a minimum with the short20 cal bullets.
I'll keep this in mind.
 
^^^This is not true. I have a 22 Grendel and it runs just fine. My problem is the suck ass accuracy.
Barrel? Twist? Bullet? How fast? Define “suck ass…”

I’ve found that mine blows up 88gr eldms above 2800 fps out of a 6.5 twist. About 1 in 10 don’t make it to a 100y target.
 
A few of us bought into the 22 & 6mm PDK chamberings for custom AR15s several years ago. At the time, the fellow who was promoting the PDK line of cartridges was buying his brass from Silver State Armory, and although mine worked ok, I felt that forming PDK from Hornady 6.8 SPC provided better accuracy, if not better case life. While in this case it was more of an opinion of mine, there was certainly no doubt when it came to comparing 6 HAGAR brass made by Hornady to the stuff I worked so hard to form out of R-P 30 Rem brass - shooting the Hornady brass turned my HAGAR upper into a tack-driver compared to the lack-luster accuracy I got with that 30 Rem crap.