I've recently (finally) set up a Dillon 550B press and started using it with my uncle, who is setting up a nice reloading room in his air conditioned garage. (aaahhhhh, luxury!) I've got a bunch of 452-200 hollow points cast with my mold from Miha, which I love, and casts beautifully.
We're having some problems with failures to feed. I have one of the Lyman pistol cartridge gages, and the rounds all sit in it properly flush, so they should chamber fine.
He's shooting a Ruger New American .45acp. I'm shooting a Wyoming arms .45 and a couple Kimbers. His Ruger has a lot more trouble with failures to feed this ammo than my pistols do, but I've had failure to feed in mine as well.
The brass we've used so far is once fired, and we ran it through a Lee Bulge Buster just to eliminate that variable. We're tried 5.2gr of AA#2, and 5.4gr of AA#2 so far.
I've tried OAL 1.180", 1.190", and 1.200".
So those of you guys using the Mihec 452-200 mold.... where are you setting your OAL? Since the stuff is passing the plunk test in the Lyman pistol cartridge gage when it comes off of my Dillon 550b, I'm thinking our issue has to be OAL, and his Ruger New American must be more sensitive to it than my Kimbers.
Make sense? Am I overlooking something obvious? I've loaded a lot for revolvers and some for bolt action rifles... but I don't have much experience loading for semi auto pistols yet.
Thanks for any helpful advice in advance.