Hmmm, not counting handguns shooting "rifle" calibers, and not counting the Linebaugh calibers (.475, .500, etc.) and other semi-wildcats which are commercially available in theory, but I don't think WIDELY commercially available, the biggest BULLET traditionally viewed as being for a handgun is probably the 325 gr (and up - ?) for the .50AE round. I think the biggest CARTRIDGE (girth, powder capacity) is probably the .454 Casull, or maybe the AE - don't know. The most ENERGY would be basically a tie between the .440 Corbon, and the .454 Casull (arguable whether .440 corbon is "commercially available" - it is from Corbon, but maybe not in your store. Desert Eagle offers the pistol) . The most MOMENTUM would go to the .50AE, I believe.
But liking energy over momentum, I'd choose for T-Rex: .454 Casull, then .440 Corbon, then .50AE, then .445 Supermag, .44 Rem Mag .41 Rem Mag, .40 Super, .45 Win Mag, .460 Rowland, .45 Super, .45 Colt, 10mm Auto, .400 Corbon, .45 ACP, etc., all in steel-core ball ammo for max penetration.
But those choices are ONLY if backed up against a wall. If not, I'd be right there with Fitz, running like a wild man for the caves like that family in "Land of the Lost". Actually, I'd only have to outrun Fitz - he'd make a more appealling (larger I mean) lunch to T-Rex anyway.
But FUD, having said all that, if this is really bout gators, I'd pick the Taurus Raging Bull in .44 Mag, not 454 casull, with an 8.375" bbl. Would do nicely, and you wouldn't even feel the recoil, what with porting, underlug, and rubber grips.
[This message has been edited by Futo Inu (edited July 13, 2000).]