# 1. rule. cast bullets must be a tight fit in the weapons throat, nor bore but throat. With weapons like M1A, M1, AK's ect. that you cannot easly slug the rifles throat go 3 to 4 thousandts over bore ID, ie, 30 Cal. go .310-.312, for the AK / SKS .313-.314. Unless you can buy cast bullets sized larger than the usual .309 you are just going to make noise, might be good for letting children & grand children shoot at close ranges, but nothing more
Photo shows a test group out of an M1A shot at 100 yds using a 200 gn. cast bullet sized .311
http://castboolits.gunloads.com/index.php
look at the MILITARY RIFLES forum