eighty8fierogt - 1/22/2007 9:35 AM
He'd gain from not haveing any over penetration.
Personally, I can see PLENTY of advantages in having "too much" penetration but I cannot see ANY in having too little.
During the course of just over a quarter of a century of hunting with spring-piston air rifles, I cannot recall a single instance in my own field shooting where I found myself wishing that I had LESS penetration. The more the merrier, as far as I am concerned. I want all of my shots to be complete pass-throughs with an entrance and and exit wound. I want that whether I am shooting little 9 ounce valley quail with my air rifles or big game with my firearms.
Given the choice between .177 or .22 on the same spring-piston powerplant, I'd rather shoot the .177. I can work with "too much" penetration but I can't do a whole lot with too little.
I reckon it is a difference in basic philosophy, but I don't have a lot of faith in "energy transfer" or "hydrostatic shock" in terminal ballistics. I have plenty of confidence in the combination of PLACEMENT and PENETRATION, however.
If you shoot a cottontail in the "magic spot" behind the eye and below the ear with any mid-magnum springer, regardless of caliber, out to 50 yards or so, the predictable and repeatable result is instant death of the rabbit who received the thump on the noggin. The issue here is that you have to actually HIT the magic spot and with some classes of air rifle -particularly the mid-magnum springers that most air rifle hunters still rely upon in this country, hitting that spot is much easier with a .177 than it is with a .22.
How?
Because even a gutless little R-9 running at 13.5 to 14 ft/lbs will drive plenty of hunting style domed pellets with ballistic coeffecients (BC) of over .020 fast enough (850 ft/s+) to allow a point blank range of 50 yards. A .22 caliber air rifle running at the same power level won't.
-JP
http://www.uplandhunter.net