I never trim 45 either. With brand new brass I make a point to debur the case mouth but that's about it.
I use a taper crimp since the 45 headspaces on the case mouth. I use a Lee factory crimp die which works really well.
If you were loading 357 or 44 or something with a bullet cannelure the case length would be a little more critical but even then a few 1000's isn't a lot.
I haven't reloaded in quite a spell, I loaded a whole bunch and haven't shot much. Need to blow the dust off stuff and make some more.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."