I have not used that specific bullet from Beartooth but I have used their 185 FN HC with a gas check in my max. Excellent bullet too. Just from that experience I would say you will have problems with OAL. Even the 185 gr. required I have the cases trimmed to minimum and seat the bullet completely to the cannelure. A longer bullet would take up a lot of powder space and possibly not allowed the rounds to chamber in my gun. I would call/email Marshall and ask about 210 gr. bullets. My .357 max was a 1-14 twist carbine from VVCG and I never shot anything heavier than a jacketed 200 gr. RN Sierra.