I burned off a brick of dynapoints between my cooey and mkII without a hitch, I agree they are excellent bulk ammo. Only thing I didnt like about them was they "sounded" a bit weaker than the xperts and hit 1" lower at 50 yards. But they shot exellent groups and functioned flawlessly in both rifles. I had sighted in using the xperts and found the dynapoints to be 1" lower, yellow jackets were 1" higher, and the federal bulk was dead on. As I stated previously, in my mkII, neither the xpert or the yellow jacket will feed reliably, and of course the cooey will eat anything made. I bought a box of the "333" today which I plan on shooting tomorrow if weather permits. I do not have high hopes though, as they simply look like copper plated xperts with the gaping hollow point and all. Im sure the cooey will devour them, but, knock on wood, I think the savage will have trouble with them simply due to the shape.