One thing you can try with plastic wads to expand the gas seal is to mash and twist the seal against a round metal object. I do this with TPS wads in turkey loads shooting TSS. I've also wrapped Teflon plumbers tape around seal, tucking overage into cup. Another method is to peel apart an OSC to about half thickness or less and place it directly on the powder and seat the wad on top. With fiber wads, no need to split. With plastic wads I want the powder to push the osc into the bottom of the gas seal's dome shape. I store extra shells mouth up and don't leave them in the truck in which road vibration can contribute to powder migration if shell isn't upright, head down. My powders are fine ball powder in .410 and more prone to migrate than flake. I've not had a blooper but others have with other gauges, ball powder and certain plastic wads from BP in plastic hulls. Clear plastic wads by FIocchi allows observation of possible migration past the seal in 12 ga. Gil
Last edited by GLS; 12/17/23 12:29 PM.
