GTA
General Discussion To Gateway To Airguns => Hunting Gate => : redroush00 April 19, 2010, 11:11:56 PM
-
If you shoot a mouse with a 1000 fps 177 thats got to be close to a human being hit with a 50 cal. What would the rimfire caliber comparisons be between say a black bird, rabbit, raccoon etc vs bullits an a 150 pound individual?
Of course, shooting a Hippo with a 177 is probably no more than shooting a spitball at someone, if that. :D
-
You couch the question in a funny way. Do you mean, what is the ratio of the bullet mass to body mass? And if so, is it a relevant comparison? I doubt it. It would probably be a better comparison to look at energy, not mass, and not just energy, absorbed energy. That is, a projectile that stops in the larger, thicker tissue of a man delivers all of it's energy whereas a projectile that passes through a small varmint delivers only a fraction of its total energy to the target
Here is a rough estimate.
150lb man vs 1lb squirrel = a factor of 150X mass
40 grain (22LR) bullet vs 8 grain pellet (.177) = a factor of 5X mass
40 grains @ 1250 fps =139 FPE , 8 grains @ 900 fps = 14.4 FPE, or a factor of 5X mass and 10X energy in FPE between a typical 22LR and .177 air rifle (energy = 1/2 mass x velocity squared, so energy goes up proportionately to the mass but increases as a power of 2 to the velocity.
150 x the mass of the 8 grain .177 pellet at 900 fps would be 1200 grains, 1200 grains at 900 fps, or 2159 FPE
a 7mm Rem Mag with 185 grain bullet at, what, say, 2500 fps (guessing) would be 2568 FPE
so, maybe one could make the comparison of whacking a 1-lb. squirrel with an 8 grain pellet to shooting a 150-lb man with a 7 mm Rem Mag, using proportionate mass as the factor, but I doubt that is a "fair" comparison.
-
Dam Tommy.. Way ta get all technical and everything.. double thumbs up dude....(http://../jscripts/tiny_mce/plugins/emotions/images/smiley-wink.gif)
-
holy smokes Tcups are you an engineer or what? i dig your math boss.....
-
Hell... I thought everybody knew that.. :p :p 8) Thanks Tommy.
-
That's some awesome math! Lol I know I'd hate to get shot with a 7 mag. And basically off this math my gamo hunter is the pellet rifle equivalent of a 7 mag! And my 350 would be along the line of a 338. Realy puts things in perspetive on how these little animals feel. And now that I think about it, shooting a squirrel with my 350 is like shooting a small deer with a 338! Wow that's overkill. I almost felt bad but then you can look at it as humane. It's definately getting the job done.
-
Man, you need help! :emoticon: I can barely figure out the mpg on my truck! Very nice explanation.Thank you.