Great choice of bullet, so use a powder between IMR 4350 and Reloader 22, set length for magazine and function, then work up. Some powders will be much better in the barrel than others. In my '06 Ackley IMR 4831 is the most accurate, while R22 is the fastest. IMR 4350 was a standard for many years and should not be discounted from an acuracy point of view. I use standard primers unless a charge weight exceeds 60 grains, or the temperatures are below 20 degrees F.