Well, the verdict is mostly in on my jamming SBE. Replaced the locking pin, shot a 3DRAM load, still jammed, put a 3 3/4 DRAM in, cycled fine.
Apparently, my SBE WILL NOT shoot 3 DRAM loads no matter what I try. I find that to be complete garbage. there are 3 other SBE on my trap team and they have NO problem shooting 3DRAM loads.
I am still open to suggestions.