I've been using 8 grains of PP pushing the 429421 (255 grain plain base SWC) and is an excellent load in its own right. It basically duplcicates the "Skeeter-Keith" load of 7.5 grains of Unique but does it within SAMMI spec pressure. I clock between 990-1005 FPS with this load from my 6.5" S&W 624...it is extremely narrow standard deviation with very high accuracy. Cleaner burning, too. Great all around load, but I have a hankering that it could be powered up slightly to 22kPSI or 25kPSI and nearly match the slower powders in performance. If someone with QL could run that out it would be great. This bullet will seat .385" deep in the 44 Special case if crimped in the groove.