I've been using Blue Dot for 25 years now, in everything from 38 special to 44 magnum. Alliant may have detected pressure differences with newer equipment, but with proper load development, I have never, ever had a problem with it!
I'm going to buy a new P95 in the next month. For a decade now I've been using homemade "Ed's Red Bore Cleaner" that contains 25% acetone. Does anyone here know what the effect acetone or Ed's Red has on the P95 polymer? By the way, I have a synthetic stocked PC4 carbine that doesn't seem to...