Tried 4227 in my AR platform
I finally picked up some IMR 4227 as was suggested here. I couldn't find much in the loading data for it, but I found references of 9.8-15grs. I started low 10.0gr, the bullet lobbed toward the target, I watched it go 20 of the 35 yards. I burnt up a couple of other rounds and they shot much higher than the IMR loads. The IMR loads cycled nicely, the previous load did not, one step forward.
I haven't decided yet if I am going to try 10.5 or 11gr for my next trial, any suggestions? LC 223 brass cut down, CCI small pistol primers, Sierra 220gr match king.
|