See post 13 for results of test loads of amax with a M3.
I have 300 AMAX 750 grain 50 bmg bullets. They are much longer than a normal bullet, but they have a long major (0.510)section I can crimp with. I was wondering if anyone has loaded the amax 50 bmg bullet for use in a M3 and what the OAL was to get the bullet to work properly.
Does the fact that this bullet will be seated so deeply to maintain an operating OAL effect pressure? I do the same with my 223 loads to fit the amax bullets in the magazines of the AR's and they function fine and shoot wonderfully accurate.
The length of the major section (0.510) of this A-Max bullet is almost 1" long (0.94)
The start of the major section is around 1.5" back from the tip. I can seat that bullet that far in and still get a good crimp. I have to do the same thing with my 223 loads and it works fine...but I know 223 and 50 bmg are two different animals.
I am sure seating a bullet so far into the case HAS to increase pressure however, and I do see in some manuals they require extra OAL, but not that extreme in the case of the 223.
I am not sure how fast that bullet will let lose, and how fast the pressures build, but I know it has to be constant with boyles law...
Bottom line is, I don't want to blow up my M3