I ordered 100 rounds for my 50 AE. Every one of the cases right out of the box allowed a bullet to slip right in with hand pressure.
I had to resize the cases. No biggie, bulk brass often is beat up and dinged (at least rifle) and needs at least a very partial resize to square up the case mouths.
Overall, Starline 10mm brass itself seems very reliable/strong from a quality standpoint.
Federal is definitely a notch or so down on the quality scale, at least IMHO. I have had split cases with some reloads...and this was in a fully supported Kimber chamber.
As far as trimming, check case length on a few fired cases before reloading. I rarely have
ever trimmed 10mm brass.
The primer pockets seem to get loose before the cases grow to long. YMMV.
Most reloading manuals have plenty of good basic info on reloading pistol cases.
Always check
any new brass before assuming it is good to go.
BTW, oki, I merged your other topic here so it should pick up some more responses!
TG