I've tested different neck tensions with SAC bushings and expander mandrels from loose to tight. Makes no difference. The brass comes out like it was shot out of a bolt gun. Barely even feel or see anything on the case rim.
I've been shooting AR's for 30 years, have built a ton of them. My target AR15 (223) shoots 3/8", 100 yard groups pretty easily and consistently from the magazine.
Built another AR10 308 with top tier products... because I'm pigheaded and won't give up.
Matched AERO upper and lower
Nightforce...
I'm old and my geometry is long gone. Weird question I cannot answer.
For sake of argument lets assume a rifle will put every round though the same hole......
What amount of movement at the bench would cause 1/4" impact movement at 100 yards? 1/16", 1/8"??
I've long forgotten how to calculate...
My experience with over gassed was the bcg was moving rearward so soon the extractor was almost tearing the rim off the case. It would get the occasional feed the next round, before the first was ejected. Installed an AGB and a heavier buffer and it was much better with little to no marks on the...
Best group yet with my XRAY51. Alpha brass, Federal small rifle, 168SMK, 40.0gr. IMR4895, 1.616 shoulder, 2.205 ogive. Just 3 rounds at 100 yards, but I'm happy. Mike said to try the Federal T308T... I'll see what they do.
I have a Kreiger 224 MTU profile barrel blank.
Anyone recommend a good gunsmith or company that can turn it into an AR15 20" barrel? Install the barrel extension, gas port, etc. Thanks in advance.