OK, I have a problem. I've been loading 44-40 for the past few years - close to ten. I now have ammo that won't fit my guns. I got smart and did some measuring, simple, I know. The ammo that fits my gun measures .441 at the top of the cartridge, the base of the boolit. The ones that don't measure .444.
Boolits are the same and sized to .429. Recently ones loaded were resized to verify no growth. Brass for both is R-P. Reloading dies are Lee and have been all along. The Lee Factory Crimp die has been used for all of them. Of course, this is the rifle die and it does not size the case. A sized and not boolited case fits into the gun easily.
So my problem is, What Changed?
I'm seriously considering buying the RCBS black powder dies.