Stick with the heavier bullets - last thing you want is underpenetration. There was an article in this month's Shooting Times about a couple of new .22 WMR loadings, but here are some data for the caliber out of a 4" tube:
Bowen Bearcat .22 Magnum, 4" barrel
43° F, 5950'>sea level, c. 45% humidity
CCI 40-gr TMJ: mean 1214 fps/ Extreme spread 30.41 fps/Standard deviation 13.26 fps
CCI 40-gr JSP: M 1311/ES 105.8/SD 57.55
Win Super-X 40-gr JHP: M 1421/ES 66.33/SD 27.67
Fed Champion 40-gr FMJ: M 1296/ES 60.87/SD 26.68
Win Dynapoint 45-gr HP: M 1129/ES 99.46/SD 38.41
54°F, 5950'> sea level, 20% humidity
Win Super-X 40-gr FMJ: M 1385/ES 61/58/SD 25.80
Rem 40-gr JHP: M 1271/ES 74.71/SD 32.48
77° F, 5950'>sea level, 40% humidity:
Winchester Supreme 30-gr JHP: M 1653 fps/ES 205.8 /SD 82.35
Winchester Supreme 34-gr JHP: M 1611/ES 79.69/SD 30.29
CCI 50-gr GDHP: M 1271/ES 67.35/SD 21.95
Accuracy, of course, is going to vary out of your gun so test a number of them. I found that some loadings gave me patterns, others were accurate indeed.
Last edited by Erich; 11-23-2011 at 01:43 PM.
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