Re: reloading question
Just a few thoughts...
Some of them will echo RMulhern's post, some will contradict it...
With ony one firing on the brass, you are probably not having problems with your shoulder to base dimension... its more likly that you aren't using quite enough lube on your expander, and are pulling the neck/shoulder junction forward a bit when its extracted.
What dies are you using, and with what brass?
Whatever you do DO NOT set up your sizing die with the bottom of the die touching the shellholder!!!!!!!!!!!!
This will result in excessively setting back the shoulder, and will substantally shorten brass life.
Also, is the pressure present if you chamber, extract, then rechamber the same rounnd? if not, long seated bullets aren't the problem.
A hard closing bolt in and of itself is not a major problem in most rifles. Some of my longer lived brass in my 300WM fits the chamber very snugly and continues to deliver superb accuracy. The whole "bump the shoulder craze" that has taken hold in many circles ignores what it is that bumping the shoulder was intended to do... and thats reduce stress on the action that might produce uneven stress and degrade accuracy. if your "snug fitting" cases shoot well, don't worry about it.