My load for 135gr Bayou Bullets is 3.7gr ETR-7 @ COAL 1.110"- @ 134- PF.
I just worked up a 124 gr load (ACME 124gr NLG) with ETR-7 for a Stock 2 (4.5" polygonal barrel). COAL without adjusting seating die came out to 1.085"-. I started at 3.8gr and finally hit 134-135 PF at 4.1-4.2 gr of ETR-7.
With the 134's, Extreme Spread was wild at lower powder loads (3.8) but got better as I increased, ending stupid tight at 4.2gr. This powder likes to be burnt hot.
No opportunity to test yet, curious how the 124's at the same PF will measure (e.g. Bill Drill speed/accuracy) and 'feel' relative to 135's in a heavy-ass Stock 2. Also group size - IF I can shoot consistently enough to tell a difference.
UPDATE: I can't feel an appreciable difference between 124's and 135's. The ACME NLG 124's are harder to get the MBF tooned properly for. Even after a fair amount of fiddling I still get upside down bullets occasionally - and this kills any savings. The 135's 'just worked' in the MBF regardless of how the 124's were or weren't working with various tweaks. Sticking with the Bayou 135's.