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I started getting reliable cycling at 13.4 grains of H4227. I use 14 grains to make sure they cycle every time. This load is crankin out at about 1600 fps.
Cast loads as a general rule will run at a lower pressure and slightly higher velocity than jacketed, due to less bore friction and easier engraving to the rifling.
I'm starting to experiment with cast and sub sonic. I loaded up 20 rounds of the afore mentioned cast bullets with a charge of H335 to see if that will cycle the action, my theory being a slower powder will have more pressure at the gas port than a faster powder.
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