I had one lot of Bertram .45 Basic brass for my .45-120 Sharps that blew the bottoms out of the primer pockets the first firing, leaving a big hole where the primer should have seated. When I confronted Bruce Bertram about it at the SHOT Show, he did give me 19 new cases, since that's all he had with him in Vegas. Those have held up better, but the quality of his brass varies. I also have some that the rims were too thick, and since the .45-120 headspaces off the rim, they wouldn't allow the bolt on my falling block to close. I fixed that by taking a few thousandths off the base and recutting the primer pockets, since this batch had enough brass in the base to allow for that. By the way, these cases run about $3.00 each retail.
Like I said, his quality varies, but there are some scarce calibers where he's the only one offering the brass.
Hope this helps.
Fred