Will a 45 70 kill a grizzly bear? This doesn’t turn the .45-70 Government into a flat shooting or long range cartridge, but it does noticeably improve the ballistics. If it does shoot well in your rifle, then this may well be the best .45-70 ammo for hunting deer, black and grizzly bear, feral hogs, and moose. Grizzly Skins of Alaska is a family owned business that caters to discriminating and adventurous travelers wishing to experience the remoteness and beauty of the true Alaskan wilderness [email protected] Become a newspaper carrier for the Idaho State Journal and earn extra cash! The only exception to this rule may be Grizzly bears -- But IIRC That is really only an issue in like Montana. Just stay out of bars and you should be ok. Something in either 10mm or .357mag I feel would be your best bet aside from a shotgun. Jan 28, 2020 · While there are several types of effective handgun hunting ammo, the 10mm auto provides more power than a .357 Magnum. 10mm ammo is also a good all-purpose round that can be used for target practice, plinking and self-defense. Small to Medium Game. Hunting small to medium game requires less power than if you were targeting a bull elk or grizzly bear.