A bit off subject, and this is based on results from a sample of one 52...don't assume the oft-repeated Bullseye load of 2.7 or 2.8 grs. is the best. My gun is notably more accurate with 2.5 grs. than heavier charges. Regardless, with a new gun, I'd shoot groups with at least four or five different charges. I've had best results with bullets sized in a .358" die, but some shooters find better accuracy with other sizes.