I've been loading dummy rounds to get my initial settings where at least they'll feed before I starting loading minimum rounds. Here's what I have:
Lee 6 cavity .452 200 SWC mold
Lee .452 sizer (pushes through at .4525)
Lee 4-set die with Factory Taper Crimp
Sig 1911 Tacops with factory sig mags
I loaded three dummy rounds at the length called for in my lyman book (1.250). Taper crimp, at least from what I'm reading, should be .470.
After loading 3 dummies at 1.250 and putting a taper crimp in with the Lee factory taper crimp on 1/2 turn in, I get a taper of .473 and a bullet that won't feed all the way. It's out about 1mm or so.
I pushed the bullet down so the band is just barely above the case mouth -- almost even -- and turned my taper crimp die down 1 full turn. I get an OAL of 1.21 but I still have what seems to be a visible "bulge" from the bullet pressed deep into the case. Even with the aggressive taper crimp, the best I can get is .473 at the mouth.
The round will now seat fully literally by a hair and will slide in and out with just a tiny amount of friction but in no way will it keep it from going fully into battery. (a factory 230FMJ drops in and out very easily with apparent room to spare). I cycled three through the magazine and they all fed, seated, and ejected fine after several attempts so I think I've found a setting that's close.
I also popped a couple of dummies out with my inertia puller and found the boolits to still be .4525 as they were originally coming through the sizer.
The question is, is this what others are experiencing? I'm going to load Bullseye and will work up a charge, but want to make sure I'm not too far out of bounds.