Now you're going technical on me...."...squishes" it back to round.
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Now you're going technical on me...."...squishes" it back to round.
I don't know how either. But I got round .311 bullets out of it. Before sizing, the calipers were only showing .0005 out of round. But that's outside of my caliper's measuring ability.I have never understood how expanding the mold-face separation
distance -- in one direction -- doesn't result in an oval shaped bullet.
How long is a few times? Like one second on low?When I modify a mold I get it up to casting temp then pour 2 with the sprue out of the way and as soon as I pour I insert a screw into the lead before it sets. Once the bullet is solid I remove it marking it so I know which cavity it came from.
Next you coat the bullet with valve grinding compound or similar then put it in the appropriate cavity and close the mold. Spin it a few times with a slow speed drill, repeat on the other cavity(ies), clean the mold, then cast a few and see if you need to do more.
How long is a few times? Like one second on low?