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darkgael · May 20, 2009, 05:35 AM

The most accurate ammo, in general, is SV. Depending on barrel length, a .22 pistol may not benefit at all from the use of HV or HpV loads. Try chronographing the three types. The most uniform will be SV. There may be little difference, little increase, from the other two types. I found this to be true for SV and HV from my S&W 317 Airlite. Didn't try the Hyper stuff.
About Hyper-Vel .22s: Barnes' Cartridges of the World makes the comment that "In some instances, particularly in short barreled pistols or revolvers or any revolver with a large cylinder gap, these loads can generate much less energy than standard 22 Long Rifle high velocity loads. They may actually exit the muzzle slower."
In addition, CotW did fairly extensive accuracy testing of of Hyper-Vels. They found them good enough for hunting with a rifle, though even the best of the Hypers produced groups three times larger than the HV ammo used as a control and more than ten times larger than the best SV.
IIRC, some manufacturers caution against the use of the hyper velocity stuff in pistols.
Pete

May 20, 2009, 05:35 AM	#9
darkgael Senior Member Join Date: February 9, 2006 Location: Homes in Brooklyn, NY and in Pennsylvania. Posts: 5,473	.22 The most accurate ammo, in general, is SV. Depending on barrel length, a .22 pistol may not benefit at all from the use of HV or HpV loads. Try chronographing the three types. The most uniform will be SV. There may be little difference, little increase, from the other two types. I found this to be true for SV and HV from my S&W 317 Airlite. Didn't try the Hyper stuff. About Hyper-Vel .22s: Barnes' Cartridges of the World makes the comment that "In some instances, particularly in short barreled pistols or revolvers or any revolver with a large cylinder gap, these loads can generate much less energy than standard 22 Long Rifle high velocity loads. They may actually exit the muzzle slower." In addition, CotW did fairly extensive accuracy testing of of Hyper-Vels. They found them good enough for hunting with a rifle, though even the best of the Hypers produced groups three times larger than the HV ammo used as a control and more than ten times larger than the best SV. IIRC, some manufacturers caution against the use of the hyper velocity stuff in pistols. Pete __________________ “Auto racing, bull fighting, and mountain climbing are the only real sports ... all others are games.” Ernest Hemingway ... NRA Life Member Last edited by darkgael; May 20, 2009 at 05:56 PM.