That's interesting! He did that with a no-dash 52 (not a surprise) but if his recording is accurate... his load was a 148gr wadcutter over 2.3gr Bullseye?!

Most use 2.7 or 2.8. I've never heard of trying a wadcutter with 2.3 grains Bullseye. In fact, I'll say that in a revolver with a flash gap (that bleeds much needed pressure), I would not try that load. In a 52 with a sealed chamber/barrel, I would imagine that it's fails to function the pistol, but it would be interesting to try.