Re: Brass
Brass that has experienced high pressure will give fewer loads, but ejector marks by themselves shouldn't be a sign to stop reusing the brass. What you will find is that the primer pockets are a lot looser on brass that has experienced high pressure.
I have 5 pieces in a batch of 75 right now that got the stout load during load development. I always know them when I go to seat the primer as the primer seats with very little resistance. I tend to segregate those cases and use them for sighters or foulers. I haven't really noticed a difference in accuracy or POI for those 5, but it makes me feel better to segregate them because I am anal. Likely I will throw those pieces out before the rest of them.
They had ejector marks, but after a couple of firings and tumblings in SS media, you can't see the marks any more.