Paul,

I asked the same question not long ago. Only a couple of responses

http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/11624192/Bertram_Brass#Post11624192

I did find a thread on another hunting/shooting forum and the responses seem to be either very good or very bad and nothing in between. The bad say inconsistency in rim thickness and extraction groove.

Many of the good are for rimed cases such as black powder cases and nitro express cases.

I was looking at the 7mm WSM cases (it seems Winchester has discontinued them).

What cases are you looking for?

8mmwapiti