I had a DBM SS 700 years ago NIB that I never fired, it was a 10 ROT whereas the HB models had a 12. I found that interesting.

FWIW, I've never "Over-Twisted" anything, run 8t 6BRs with 66-105 and shot 1/4 to 1/2" 200yd groups for 3 time and again.

MM - are you there? You shoot heavies, likely in the 10t, have you run any 130s thru the same bbls? Thanks.