Boy, sort of blown away here.
Yesterday I shot my new Bisley Blackhawk 44 Special. Only modifications has been to swap out for Belt Mountain #5 Base pin, which is excellent and installation of Wolff reduced trigger spring (hammer spring is factory).
Two loads tested: 9 grains of PowerPistol and 16.5 grain of 2400 both pushing MP's H&G503 clone mold solid cast of 96-2-2, sized .431, and carnuba blued. Sparked by CCI 300 Primers (standard large pistol). This is a solid load for these 25,000 PSI capable heavy 44 specials!
Solid velocity figures of 1050s FPS from the PP. But even more impressive was the deviation. I thought my crono was wrong because the PP load showed the SAME velocity number for the first two shots. The next four were between 1051 and 1057. This was from an initially clean barrel. Some fowling was present by the 6th shot, but not much. No metallic fowling that I can tell.
Now 2400 had its chance, which really surprised on the velcity. Out of just a 5.5" barrel 1250s FPS were achiveved, and again with single digit deviations. While I didn't get the SAME exact FPS figure twice in a row, all six were between 1251 and 1259 FPS! This is basically a marginally reduced Keith load. I backed away from 17 grains because it looks to be compressing and the H&G 503 is a tad heavier than the 429421. Still even at a half grain less it gets outstanding velocity, basically modern 44 mag. I'm tempted to back it down to 16.
Even better the sights were pretty on. At 25 yards about 1 inch to the left and 2 inches high for the PP and 1 inch to the left and centered for the 2400 load. Groups with not the best trigger and an out of square front sight were 1.5" or so, which is incredible. It may be more accurate than my 22 handguns, a Contender with a match barrel and H&R 999.
Another nice thing is the recoil is most manageable with the Keith load and hardly anything with the PP. The Bisley grip shape is very comfortable for me and that heavy barrel and grip frame really soaks up the shock. It is a far, far less violent felt recoil than my S&W 624 with 6.5" barrel with the same loads.