mitchmtm1

Might check with Cayugad, he shoots a Black Diamond and for the primer retainer spring to break is not an unheard of problem. It has happened to him a few times.

Since the BD is a open breech - blow back can get back up the nipple farly easily and there really is nothing to hold the primer in place other the hammer spring. Plus using a W209, which creates a lot of heat and pressure on it's own adds to the problem. Another poit that adds to the problem is 3f Triple Seven - 3f ignites and reaches peak pressure so much faster than 2f that it will add to your blow back problem in that the bullet has not cleared nor has it progressed up the barrel far enough to increase the bore volume before 3f reaches peak pressure, especially with a 300 grain bullet. Thus the easy way to vent pressure is back through the breeh plug.

Couple of thoughts you might consider... Try some 2f powder, use a cooler primer. Here is a list compliled by Bridges..

Winchester 209ML ........................221 f.p.s.
Winchester 209 Triple Seven ML.....244 f.p.s.
Remington 209 Kleanbore ML ........318 f.p.s.
Std. Winchester No. 209A ..............336 f.p.s.
Std. Remington No. 209 .................341 f.p.s.
Cheddite No. 209 ...........................347 f.p.s.
Federal No. 209A ...........................381 f.p.s.
CCI 209M.....................................379 f.p.s.
Remington STS..............................338 f.p.s.


I 'think' Cayugad has gone to shooting #11 Mag caps from his BD to alleviate the whole problem.

You also can call TC and they will send you out some replace springs for your nipple...