I guess I'm not surprised. Having owned several .220 Swifts over the years, I learned that it is a pretty low maintenance caliber if you load it at or slightly below .22-250 maximum velocities. But trying to get that last 150 fps out of it turns it into a real high maintenance caliber - mainly due to the case design. Long sloping body with a gently tapered shoulder - great for feeding, but poor for case life and other reloading considerations.

However, like the .300 H&H, it is an inferior case design that delivers very superior accuracy.