Quote:
Originally Posted by Eagle223usa
I just started casting and loading for 30-30 in a 1941 M94 20". I am using my cast bullet, Lyman .311041 cast from 50/50 WW and Lino and sized to .309. I am using 3031. I got decent 50 yard accuracy but some oblong holes. I loaded the next batch with bullets sized to .311, we will see how it works.
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If you are getting keyholing (really yawing, evidenced by oblong holes in the target), it generally means that the bullets are too long to stabilize properly at the gun's rifling twist, at least at that MV. I doubt increasing the bullet diameter will cure that, but it's worth a try. I have fired 220 grain RNFMJ .308 bullets in my .30-30 and they also tend to keyhole a bit. Even so, they don't group too badly at 50 yards. It would probably produce much worse groups at 100 yards or more, but I have not tried shooting them at longer distances.