a hog does have a little different protection over the vitals.(a shield)that is on a big boar. sows, gilts,and smaller boars are ok.a quartering away shot is best,that way you can slip in behind the shield and into the vitals. if you have enough KE. for mechinals, you should be ok."NEVER" shoot the sholder on a hog,or any animal as far as that goes.always go for the broadside or quartering away shot.
I have shot mechanicals for several years now and have never had a problem.
just my 2 cents,there are 98 more. hope this helps,good luck. go for it.

I am not a hunter I am a whitetail population reduction specialest

remember keep your back to the sun, your knife sharp, and your powder dry.