Ive used plenty of mechanicals, and have never had a problem with them on deer, but with hogs Ive had a problem with penetration. I like a good fixed for hogs, like Muzzy three blades or sonics. Also, I like a little smaller cut radius than I do with turkey or deer. Ive take quite a few hogs with mechanicals, and have found out, you need to go for the lungs with mechanicals. If you try heart shots and get just a tad off, they will not penetrate very well.

IF you are having problems with fixed heads flying funny, you need to check your bow or arrow to see if they are tuned right. My fixed fly just like field points all the way out to 40 yards.