Take the whole lot out while doing something mindless, like watching TV, the Great Wasteland.
Sort them, or if you feel clinical, perform triage. Three piles; 1. those with straight case mouths. 2. Those needing a tweak 3. those that look beyond hope, but might be resurrected. Your standard should be fairly strict, as resizing a turned mouth can result in a crumpled mess.
Lot 1. go straight to resizing. I don't know which dies you are using, but there are no carbide sizers that I know of, so it requires sizing lube, and care, or more neck crumbles can be expected. Do this later and avoid ANY distraction. Before doing the whole bunch. try a few in ALL of your intended firearms. (there are some variations in chambers between firearms.)
Lot 2. can be straightened. I use something tapered, like a .303Brit case or the tapered exterior of a small hollow punch. Some can be saved by using something as a hard mandrel (close to the inside diameter) and tapping the offending area with a no-mar hammer, Its a good job to do while watching Dancing with the Stars, so you aren't distracted.
Lot 3. Some with care can be saved like Lot 2. If the case mouth is crumpled/creased/split it will always be a problem, but don't throw it out it yet!
I cut them off and convert them to .455Webley. That requires shortening, thinning the rims, expanding cases mouths and fireforming. If neither you nor your friends have Webleys, send them to me. (I'll pay the postage) If anyone wishes to know more, PM me.