I've been a fan of the Precision One .38 Special 147 grain Copper Plated Wadcutters.
With my supply dwindling I recently topped off with a new order. The new batch has component changes. The most obvious is the bullet is no longer the dimpled type wadcutter but flat faced. The primer is a slightly different color.
First time at the range yesterday with the new batch, I found myself conducting an involuntary ball and dummy drill. On the good news front, my sights are steady with no sign of anticipation or flinch 😀 On the bad news front, about 1 in 5 of the new batch CPWC are failing to light off on a first strike. In some cylinders it was up to 2 in 5. I should have kept some of the brass but good center strikes at good depth on the primers. Issue occurred through about 100 rounds across two revolvers (a Chief's Special and a Model 60). Neither revolver had issues with the older CPWC batch or some random Norma 158 grain FMJ bought from the range. All failed rounds fired on a second strike.
I'll reach out to Precision One when they're open tomorrow.
Photos with old batch on the left, new batch on the right: