Well, 500fps seems like a lot to me, but then again what do I know. I dropped one of my 220 grain J40 bullets from about 8 inches above my reloading table and it got stuck in the wood. I would say about 150 fps would be enough to go though a deer. (not all the way.) According to the Marines the .308 Win has to penetrate 15" of ballistic gelatin at 1000 yards so who knows. Thanks for all responces.
a whisper from this little friend of mine goes a lot way.