More of this false assumption that a skilled user of a .357 magnum with 7 shots available and a speedloader is somehow "hamstrung" and/or "outgunned." Sheesh, where is this tunnel vision assumption coming from? The bad guys with their 9mms (and their complete lack of aiming skills) won't be able to penetrate the LEO's vests but the LEO will if the bad guys got 'em. Now rethink that and tell me again why the LEO and his .357 are outgunned!
Ok -- I only had to rethink about .1 second, and I still come to the same conclusion. You make the mistaken assumption that ALL BG's practice spray and pray and will thus deplete their ammo supply in a hurry. Not all of them are that stupid. The false assumption is yours, not mine. Fact is, BG's can get body armor as well, and have it already. And guess what? A .357 Mag won't penetrate "standard" body armor -- it isn't a rifle, it isn't a "Death Ray", and nobody makes AP ammo for it anymore anyway. They would be loaded with pretty conventional JHP ammo instead. Fact is, when the LEO is shot out he will have to do a slower reload than the BG, and will have to do so more often (on a per-round basis) than the BG who is armed with a double stack autoloader. With that in mind, I just don't see how you can claim that limiting your LEO's to a .357 Mag (which isn't a bad sidearm, just not a viable modern LEO primary weapon) is somehow not hamstringing that same LEO. Artificially limiting the capacity of the sidearm is certainly not enabling to the LEO, it is in fact a potentially fatal hinderance. This is why I consider your viewpoint to be tantamount to murderous -- you are suggesting putting LEO's in lifethreatening situations needlessly.
You make the fundamental error of underestimating the adversary. Always err on the side of caution.
You also have made the implied assumption that the LEO's will be facing lone BG's. This is an unwarranted assumption, and is yet another reason for the LEO's to be armed with the higher capacity autoloaders.
Facts are:
BG's can be just as well trained and proficient, if not more so, that a LEO.
BG's can be just as well armed, if not better, than a LEO, and that is as it is now -- further limiting ammo capacity and reload speed only makes the situation worse.
BG's can acquire body armor, and have done so in the past.
LEO's can be trained to not "spray and pray" even if they are armed with a double stack autoloader. Reduced capacity is not the answer. Training and marksmanship are.
A 7 shot revolver has only 7 shots, and that is much less than what a double stack 9mm or .40 S&W will carry. Not only that, the reload is normally slower than with an autoloader. With that in mind, a similarly trained LEO that is armed with a revolver will be out of ammo, facing a more difficult reload situation, much faster than a LEO that is armed with a double stack autoloader when both are exercising proper fire control in a prolonged firefight -- which can happen. This can be a life or death determining factor in the firefight.