n2omike
Member
- Joined
- Feb 19, 2021
- Messages
- 469
Took four different loads to the range for some testing. Took the chronograph for some velocity and accuracy testing. Platform is a Palmetto State Armory AR15 in 300 BO with a 10.5" barrel with 1 in 7 twist, muffler and 5X Bushnell scope.
I also took a 12 gauge shotgun to the range out of curiosity to velocity test some slugs. This turned out to be a mistake, as I shot the chrono with the very first shot. Oh well... $80 down the drain! ...and no velocity testing today! lol
Anyway, I had enough rounds loaded that I could still do some accuracy testing. Berrys 220 grain plated bullets were used for all trials. The powders were 10.5 grains of VV120, 10.5 grains of 4227, 9.0 grains of 2400 and 8.6 grains of Lil Gun. All cycled the gun just fine, and I've tested even lower does of these powders with success. Gun has a pistol length gas system.
At 33 yards both the VV120 and 4227 did great! The VV120 was amazing, and put all the bullets through the same hole! The 4227 wasn't far behind. The 2400 came after that and the Lil Gun was the worst.
At 50 yards, the VV120 started to spread out! ....but the 4227 stayed tight. I shot two groups at 50 yards with the VV120 to make sure it wasn't just me. These are the center and top right targets.
I WISH I WOULD NOT HAVE SHOT THE CHRONO!!! LOL
My theory is that the VV120 loads may be a little slow, and are destabilizing out past 33 yards. I'll need to order another chrono, make some hotter loads and test. It also seemed to be the quietest by a small margin. We'll see, but the VV120 seems to have a lot of promise! ...as does the 4227.
Thoughts? Experiences?
I also took a 12 gauge shotgun to the range out of curiosity to velocity test some slugs. This turned out to be a mistake, as I shot the chrono with the very first shot. Oh well... $80 down the drain! ...and no velocity testing today! lol
Anyway, I had enough rounds loaded that I could still do some accuracy testing. Berrys 220 grain plated bullets were used for all trials. The powders were 10.5 grains of VV120, 10.5 grains of 4227, 9.0 grains of 2400 and 8.6 grains of Lil Gun. All cycled the gun just fine, and I've tested even lower does of these powders with success. Gun has a pistol length gas system.
At 33 yards both the VV120 and 4227 did great! The VV120 was amazing, and put all the bullets through the same hole! The 4227 wasn't far behind. The 2400 came after that and the Lil Gun was the worst.
At 50 yards, the VV120 started to spread out! ....but the 4227 stayed tight. I shot two groups at 50 yards with the VV120 to make sure it wasn't just me. These are the center and top right targets.
I WISH I WOULD NOT HAVE SHOT THE CHRONO!!! LOL
My theory is that the VV120 loads may be a little slow, and are destabilizing out past 33 yards. I'll need to order another chrono, make some hotter loads and test. It also seemed to be the quietest by a small margin. We'll see, but the VV120 seems to have a lot of promise! ...as does the 4227.
Thoughts? Experiences?