I have a 1943 vintage SA M1 I just got from the CMP. It came with an uncut op rod and I added a Shuster plug. What are the specs on ammo I can safely use? Is it just bullet grain and bullet speed or a combination of the two.
EX) Just got a box of Winchester Super X. 150gr 2920 speed and 2839 energy. Bullet weight is fine but othe specs seem high. What kind of parameters can I use> Thanks for your help in advance.
Ed