32-20 started in the black power era. As a re-enactor, BP has to be kept dry. Dampness might reduce the power on a load.
I had one squib with PD provided low bid reloads... during training I paid for myself. There was no powder. I was lucky it tied up my M66, preventing another round being fired... although I was ruled "dead" as far as the drill was concerned.

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NRA LIFE
Reserve Officer 9yrs