W-e-l-l...
...I might as well jump into this...as the voice from the "flip side of the coin" so to say...
I use cases A LOT LONGER than most responses to this thread are recommending. I use a Redding Small-Base Type-S Full Length 6PPC die, Part # 77211. If you're having any problems whatsoever with tight cases, you need one...so buy it...and you'll never have problems with tight cases again! Forget all that garbage you're being fed about "matching your resize die to your chambers"...'cause that's just what it is, garbage. These dies are the best value in reloading tools in benchrest...and can easily be found for less than $50.00.
The first two 2-Guns I ever won were in 2000 on back-to-back weekends. Started the first weekend with cases that had over 80 firings a piece on them. Shot them both weekends. By the end of the 2nd weekend, they had over 100 firings a piece on them. Still used them for practice even after that. Started the HV class at the Super Shoot in '06 with cases that had over 40 firings a piece on them. Won the HV Grand with them. Took the barrel off and put it and the cases away right after the Super Shoot. Got both back out and won the HV Grand again in '07. By the time that one was over, the cases had over 60 firings a piece on them. No braggin' intended...just the results of my methods for those of you who are "doubting Thomas's"...
Monitor the cases carefully. Keep the overall length ~ .010" under the length of your chamber. Watch the case necks with a loupe for cracks from your sizing bushing. I agree with these guys that if you punish them at 3400 f.p.s. all the time, that they won't last as long...but you're giving yourself your best shot with one of these dies...
One more note about the die...don't tighten the top all the way down on the bushing. If you do, you'll lose necks from work hardening of the junction between the neck and the shoulder. Tighten down on the bushing, then back off about 1/4 - 1/2 turn, then tighten the lock ring. This will allow a thin portion of the base of your neck to remain unsized. Unless you're seating bullets that deep in the case, it won't hurt a thing...