I'm a long time Bullseye competitor (for whom the model 52 was specifically developed for) and have found 2.9 grains of Bullseye, behind a 148 grain Speer HBWC bullet, to be the most accurate in my pistol over the many years I've owned and shot it. This pistol can be finicky and I've had way more "alibis" with it than any of my 1911 pistols at matches. But the trigger is so good and the pistol is so easy to shoot accurately, I put up with its occasional idiosyncrasies.

Concerning the bullet type, I did read one report years ago where the shooter/author reported the base of the hollow base wadcutter separating from the bullet and causing a potentially dangerous barrel obstruction. Something to look for, I guess.