I never thought I had trouble with the 358429, cast and shot thousands with an old single cavity Lyman. Until I started shooting longer range regularly. I started a thread here a while back about it, they shoot fine until I stretch it out to 75 yards or more. Then I get really erratic flyers, like 2’ off in any direction flyers. I haven’t really tried to sort it out yet, I’ve been busy and it’s been hot. But I did buy a 38-150KT RCBS mold as one possible solution. I’ll start casting more this fall when it cools down a little and maybe get to the bottom of it, or maybe just go with the RCBS.
