Finally after many years of wanting to shoot in a milsurp match I finally did last Saturday. I just pulled a gun out that I had at least 60 rounds loaded. It was a 7x57 Chileno Mauser. Not my preferred rifle to shoot. First its not in the best of condition plus it was not even sighted in so I wasn't even sure if my loads I had were on target at 200 yards. I plan on shooting my Swedish Mauser so I need to start working up a target load. Anyone have suggestions? The bullet I will be using is 129 grain Hornady SST because I have lots of them. Powders I have are RL 19, RL 22, lots of H4831SC, some IMR 4831, H1000, plus an assortment of others that are slightly faster burning so I didn't list them. I was considering trying 38.0, 39.0, 40.0, 41.0, and 42.0 of RL19. I'm going to try RL19 first. If I switch to Hornady Match 140 HPBT, I would like to use H4831SC. Any feedback on these loads or others?