Failure to eject and unburnt powder are sure signs of low pressure and or wrong powder. I go with low pressure, unless your data says otherwise.
You know, this is proof of the superiority of 1911's, or your recoil spring is wore out!
Last, what is that powder. . .Not one of the 45 ACP staples for sure!
Also, just looking at your OAL, I'm guessing it is too short. Just thinking 1.200 - 1.275" is ideal, depending on what feeds in your guns.
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