I am trying to come up with a large front band that will stop a bullet if it jumps crimp and still chamber easily in my 454 Casull. My cylinder throats are .452". My thoughts on the front band for a tangential ogive 80% meplat .454 bullet are:
.1" long front band
.465 front band bottom diameter
.445 front band top diameter
The case OD holding a .454 bullet is .475". My concern with the .465" front band bottom diameter is crimping. Would a crimping die swage the large portion of the bullet before forming the crimp? Do you know of a good way to measure maximum front band diameter for a crimp die?
I am also thinking I might be able to get by with no crimp after getting the seating depth set so the front band just makes contact with the chamber to throat taper. Do you think an arrangement like that would cause hard chambering from fouling after several shots?