Although in a bolt gun, I believe the case shape makes the .20 PPC more accurate, what I like most about the .204 Ruger is the speed of the bullets. When my barrel gets too hot and I choose a .224 rifle from the rack, it seems like it takes forever before the bullets get to the target. It isn't 'till you get to the .22-250 Ackley, .22 Creedmore or Swift velocities that you get to the target as efficiently. The .224 cartridges with speed, suffer from barrel life in the hundreds, not thousands and the recoil obscures your view of the hit or miss. Not to mention how fast the powder goes at 40 grains a pop.