Kirk I had one years ago that I am guessing was chambered too deep. I did not get it going well enough to be any help on performance. Mine would kill the case every shot. I sent mine in to Bullberry and had it made into a 6BB Imp.

RCBS Pistol Section (Super 14 Contender)
55 Blitz will do 2700
70 HPBT will do 2500
80 Blitz will do 2350
85 HPBT will do 2300
100 will do 2200 with a couple powders

I do still have the Die Set if you need dies.

Bob R