I recently picked up a MP 358-147 mold (drops at 154gr per specs) from a recent GB here. After loading a few and pulling to check for swaging, the good news is that there’s no swaging using a Mr Bullet Feeder powder through on my Dillon 650 (which is fairly equivalent to a M-Die).
Using a Lee .357 push through sizer, they mic at .3562. So far this hasn’t caused any leading with my other 9mm molds. There is however noticeable boat tail in the boolits from the tapered 9mm cases.
I don’t have any time in the foreseeable future to actually try these out and actually shoot them, but is anyone willing to wager if this would cause any leading or accuracy issues?
Loaded and pulled on the left. Freshly sized and not loaded on the right.
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