Thread: Pierced Primer

Another first for me, had one the other day when whipping outside to bang a magpie over. Had been a good load through the winter with no pressure signs. Am wondering is this temp related? Using 2206h. Although a different container from load development.
From the gunsafe to firing(2 shots)was all of 5 minutes but it was high 20's outside.
Thinking I should run a couple over the chronograph and check speed?