I use them in a snub nosed 44spl, charter arms bulldog. Top left
Used a forester hp tool to put a huge hp in them. The forester hp tool comes with a 1/16" (rifle) & 1/8" (pistol) bits. I used a 3/16" 60* center drill to make the hp in them. The 8/9bhn alloy works extremely well with this bullet/1000fps load.
A side view of the same recovered bullet pictured above. Note that the base has expanded/enlarged/flared also.
I have 2 of the 429422 molds