3/4 load 7.62x25 SMG blanks for the Russian PPsH and ever popular PPS-43.
Full length for sure feeding and loud with big flash to get the attention of other reenactors or look good on camera.
.171 - .187 BFA recommended in PPS-43 & PPsH-41.
Adjust BFA size down for rifle length barrels.
This is our oldest and most used round in this caliber.