New York at one time had a minimum caliber restriction of .357, because the boys who did the balistic work to determine a prudent cartridge restriction came up with the "muzzle energy equivalent to a 158 grain .357magnum load"- of cours thatwas too many words, so the law read .35 caliber- which excluded lots of really adequate bottleneck cartridges- but did force my wife to buy me a 35 rem barrel for my contender, since then the restriction has been changed to any centerfire cartridge and a barrel length of less than sixteen inches, and a magazine restriction that doesn't matter to me because I never carry half a box of cartridges when I'm hunting anyway.