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At 42gr, you are below some starting loads with those bullets.Thanks. Im not concerned about feeding issues for the shorter COL/deeper seated bullets. Im concerned about being over pressure. But sounds like that might not be an issue?
I have sorted the bullets by weight, cannelure height, length and shape as much as possible. Looks like most of them have cannelures that match typical M80. But theres a couple hundred with higher cannelure. I want to use those up first.
Seating those couple hundred down to around 2.7" will get you better velocity/pressure and you will still be quite low in pressure compared to real M80.
Until you were up around 45gr or more, you will not have an issue seating them deeper and lightly crimping into the cannelure.
Hodgdon publishes a Ramshot TAC load with 150fmjbt bullet seated at 2.735" OAL with charges from 42.4gr min to 47.1gr max.