I was running the DPM progressive system and ended up battering my go gun *thumb rest [generic]*. Now I shoot either a stock 12 pound or 14 pound spring with 147 grain reloads with springer tungsten guide rod.
I remember a time when people thought under a 4 minute mile wasn't possible... Then someone broke 4 minutes and a bunch of people started getting sub 4 minute times. It's amazing how that works!