I have to treat this barrel as though it's a superlight. It shoots 2 shot groups really well. 😁
38.5gr A1680 and the 180gr Speer SPFN average 2402fps and shot into 1.25" at 50yds.
I'll chrono the 200gr FTX loads in a few weeks after I get back from Maine. My son will be hunting black bear for the first time. He'll be carrying his 357 Maxi Handi rifle loaded with the 180gr Barnes TSX FN.
Allowing barrel to cool between shots ? Maybe needs break in period ? I had a Marlin 336 that would do the 2 shot groups. Somewhere around 200 shots through it and it almost suddenly started producing great 5 shot groups. I did the typical forearm stress relieving and all that jazz to no avail. Around 200 shots it just clicked.