How do you break in a new mold? Phil Sharpe says to cast until you get good bullets.
My wife gave me a new Lyman 2 cavity 429421 for my birthday 3 years ago. My standard procedure is to cast in batches of 110 bullets and inspect with a 2.5 X Optivisor. I typically yield 104 to 106 good bullets from a batch. The first 16 batches that I cast with this mold I had a terrible time with incomplete fill. I started casting batches of 120 and hoping to get 100 that were marginal but usable.
I cast a batch 3 nights ago and knew by the 5th bullet that it was going to be a good night. My yield was 106 really good bullets from 110 cast. I feel confident saying that I finally have this mold broken in.
Let me put it to all of you: How do you break in a new mold?