Gentlemen,
It has been neat to hear some of the tongue in cheek comments on this subject. But, some of the comments regarding cartridge performance have been outright absurd. I say this out of concern for all of us woodswalkers. As most people know, long before the alligator was listed as an endangered species (1967), it was harvested with abandon. In that non-protected time, I knew men that routinely relied on the .22 LR (one shot between the eyes, mostly H&R revolvers) for most of their dispatch needs and one man who preferred (get ready) a knife. (I also knew one guy who routinely wrestled gators, but, hey, it gets pretty boring in La. and I can only correlate it to tipping cows. Just something to do.) Placement was the point. Any cartridge of decent intensity, when correctly placed, will do the job easily. In any instance where the angle of incidence is too acute in relation to the given target, then penetration could be an issue, of course, with most any caliber. However, just a moderate amount of awareness and a little common sense can go a long way to securing your safety. Gator courtship (a loud process) begins in April and takes place in water (stay out of the water!). From May throught June, the female builds her very large nest, lays her eggs, and jealously guards both (stay out of the water and away from her adjacent nest!). Alligators at any stage in the life cycle are very vocal. Listen and be aware. Of course, all this is to say there is no panacea. But, I would feel fine with either caliber and would definately prefer a centerfire handgun to a rifle, as it is a weapon of opportunity, more easily used under duress and close quarters. Bottom line is to ALWAYS have a gun and to be a good shot with a cool head (Because you will not out run the gator if he is mature and motivated).
Regards,
Docbones