Originally Posted By: Verminator2Thanks Cat, I was hoping you'd join in. Any ideas why some are harder to slip through than others once the bullet gets to the neck/shoulder junction? I wouldn't even worry about it, but my throat is so short that I can't seat above that tight spot. I was looking for something to blame the fliers on besides my shooting 
It's your shooting 
I think your procedures are fercockta.
First, why are you "bumping" with a body die - a body die is a standard FL die without a neck section - that is oversizing.
Guys read garbage on benchrest sites about FL sizing and shoulder bumping and figgure it must be good, Right?
It ain't.
First, why are you FL sizing? Do you have a receiver stretch problem? Can you chamber a fired case without problems?... if you don't have a problem chambering a fired case, then put the body die away. Take it out ONLY when you have a case that chambers with more resistance than you are willing to put up with. Tight cases are a good thing.
BR shooters Full Length size (with special dies, NOT body dies) for reasons not related to best accuracy. Short range bench shooters wait until the wind is calm and then shoot as fast as they can... maybe the whole group in 10 seconds - so it is important that the bolt close with "0" resistance so the BR rifle does not move off line when reloading. Short range bench (for aggs) is is not the intense, precision, deliberate shooting (for group size) of years ago.
Second, park that Lee collet die in the local trash can.
If you want the absolute least neck run-out and concentricity, then get the Redding "Competition Bushing Neck Sizing Die" (NOT the Bushing "S" die).
You will get less than 0.001" run-out, even with plain ol' factory brass - they are a little expensive, but probable about they same as all the junk you bought.
In summary, you should not be "bumping" the shoulder... unless you are having to much resistance in closing the bolt on reloaded cases.
And you MUST start annealing your cases.