This is often "the" magnum pistol powder in the IMR lineup. If it says magnum, IMR 4227 could be the option for accurate magnum velocities and general performance. In rifle, this powder delivers superb velocity and precision in this kind of cartridges because the 22 Hornet and 221 Fireball. Grain https://imr4955powder15814.blog5star.com/17290031/4955-powder-fundamentals-explained