One started at .017 in, now at 1752 rounds I experimented with .003, .006, and .009 additional and an additional .003 making .020 in., where I am at now. With one bump on the tuner shot 4 shoots at 200 yd in .390 last evening. The other is at .014 in at 670 rds. and is good. I have been through 20 some barrels over the years in BRX and all but 2 have shot in. Had 2 that liked about. 020 jump. They are all done0 with the same reamer and 33.4 has been the Varget load of all except for a Douglass 7 .5 twist that was 32.6. Oops, had another that like 33.6. 1 Douglass, 1 Shilen, 2 Krigers, the rest Bartline. I did a lot of testing last year with primers chasing ES. All three competition (1_6 PPC) rifles tuned to ES of 5 or under with 205M, a primer I have never used until now. Spent last winter weighing 2000 of them. Problem is as I get older I find my shooting skills and eye sight starting to go a bit south but my tuning skills seem to be better. Not a good trade off.