The ever dangerous and hard to bring down whitetail deer... And his larger and more dangerous cousin, the Mule Deer
I have seen people go from 30-30's to 7mm mag and I must say that it is now getting ridiculous. A .223 is a perfectly acceptable white tail round. It is capable of, I hate to use the word HUMANE but that is the word... humane kills on both white tail and mule deer. Would you hesitate to shoot a 300 pound man with a .223? Then why not use it on Whitetails????
Regarding the law, my advice is to follow it. Don't look for a minimum caliber, look for a caliber that you shoot well and have faith in. For me, that is the .257 Roberts. You can use it on Deer, Hogs, Black bear and as a varmint round (proper bullet selection applies).
Some people prefer a .308 or .30-06. Both are fine rifles. The .243 / 6mm are also excellent rounds, but lack the cross over potential of a .257 or .308.
The .357 magnum was considered for many years as a fine deer hunting cartridge, the .38 special was also considered a fine light game cartridge. Light game includes smaller white tails, the kind that are in Texas Hill country, a big one would be 100 lbs field dressed. But, those seem to have fallen by the wayside in the increasing crush to use something akin to proton torpedoes to insure that the dangerous whitetail plauges us no more....
Art Eatman said:
One problem with this sort of discussion is the difference in skill levels among shooters. Please keep that in mind when making "grand, sweeping generalizations."
+1 Art
EDIT - I am a 30-30 nut... Great round, great rifle / round combo, excellent for all hunting save the "western type" long shot hunting, +200 yard shots.... not a good choice.