Check the lips on your mags to make sure they're holding the round properly. Sounds like they need to be squeezed together a bit to prevent the three point jams you're experiencing. I cast the same bullet and size down to .357 in my Star with my own home brewed lube. Load with 3 grains of Titegroup with only a thumb nail thickness of the bullet's shoulder showing. Use just enough crimp to remove the bell. Velocity is about 1,000 fps +/- . Extremely accurate with no leading. This round shoots well in my Springfield 1911, Sig 226, Sig 229 and BHP. Only time I have any feed problems is when the mag lips are too loose.
A J