I settled at 2725. I had it up to 2775 with ejector marks and backed down. 20” with 180 worms and h1000. Adg brassWhat did you get velocity wise? Thinking about building a 7 sherman mega for my missus. Try and keep a 180 north of 3000 in a 22” tube
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Rl26 seems to get better velocity but mine shoots tiny little groups so I haven’t messed with it. I bet 3000 plus with 180s might have a little bite to it! I have a Dominus and the recoil is minimal.