my chrony results for various 22 mag shells.dynamit noble 40 grain soft points high 1911,low 1834 average 1877.insadently these were 20 bucks a box and didn't group nearly like i thought they would,2 inchs @100 yards.winchester 34 grain soft point,hi-2110,low-2107,average-2102 these grouped 1 to 1 1/2 inches @100 yards.winchester supremes(high volocity)34 grain hollow points.high-2045,low-2019,average2028.as you can see theses were acualy slightly slower then the standard winchesters,go figure.these grouped about the same.winchester super X.high-1745,low-1709,average-1760.these grouped around 1 inch groups @100 yards.i guess my rifle likes slower volocity.CCI maxi mag,high-1781,low-1735,average-1760.CCI maxi mag 5,high-2334,low-2131,average-2241.niether of the CCI's grouped very well in my mag but as you can see theres a big difference in volocity.the 22 mag is a great little round but don't expect 1 hole groups with any shells.some times inconcistancies between shells is great and is deffinetly wide between lot numbers.if you find one that shoots good,try to match lot numbers between boxes and you will be much better off.