Sunray, Starline makes 50-70 brass and it'll be a lot cheaper than Bertram. The quality should be somewhat better too. I've had a high failure rate with some Bertram brass (although recently I'm seeing a lot of rim thickness variation in Starline). Jamison might make that brass too.
Jerry @ Mystic Precision can get that brass, regardless of which brand you choose. I order all of my "obsolete" brass from him.
Chris.
Jerry cannot get 50/70 brass. Last time I asked, apparently his distributer's export license limits him to components under 50 caliber(regardless of antiquity). Track of Wolf is you best bet for Starline 50/70 brass, Dixie brass is the best if you can somehow get it.



























