The best 358429 doesn't drop out of a Lyman mould; NOE makes it.
Newish Lymans aren't always square and if you see it with the naked eye before you run it through a die, it isn't the bullet design.
Base first, misaligned sizing might also be suspect.
I've run the NOE version in 67's 14's, 15's, Colt Officers Models and a 38/44, on top of a King Cobra and a 28 with 38 cases. If it were the bullet design, I've never had a problem.
