| rhett wrote:|
Good morning all,
Will any rifle that is chambered for a .22LR accept .17 mach 2 rounds without any modification to the .22 LR rifle?
.17 Mach 2 is nothing more than .22LR necked down to .17 caliber. Any bolt action rifle chambered in .22LR can be modified to .17 M2 by only changing out the barrel. The same magazines for .22LR will work with .17 M2, and the bolt face is exactly the same, since they have the same rim diameter and thickness. With a blowback style semiauto like a 10/22, to prevent case rupture, the bolt needs to have more mass for the .17 M2 due to the increased pressure and subsequent increased bolt acceleration.
Obviously, you can't simply fire .17 M2 ammo in a .22LR safely because of the 0.047" difference in bore diameter, which is huge! You could chamber the .17, fire it, and it would go bang, but you wouldn't get any accuracy because the .177 bullet wouldn't seal in the much larger .224 bore, and it would be a dangerous practice.
Edited by RifleDude - January/22/2009 at 18:04