Either rifle will work just take the one that you can shoot the best. Use 180 grains for bullet weight or a premium bullet like Nosler Partitions if you use a lighter bullet. I'd go with the M1A as that sounds like the rifle you shoot the best, but you must use a 5 round magazine to hunt in AZ with a semi-automatic rifle. If you don't have one you need to find one.
R12-4-303. Unlawful Devices, Methods, and Ammunition
A. In addition to the prohibitions prescribed in A.R.S. §§ 17-301 and 17-309, the following devices, methods, and ammunition are unlawful for taking any wildlife in this state. An individual shall not use or possess any of the following while taking wildlife:
1. Fully automatic firearms, including firearms capable of selective automatic fire;
2. Tracer, armor-piercing, or full-jacketed ammunition designed for military use;
3. Shotguns larger than 10 gauge or shotguns capable of holding more than five shells in the magazine, unless plugged with a one-piece filler that cannot be removed without disassembling the gun, and that limits the magazine capacity to five shells;
4. Semiautomatic centerfire rifles with a magazine capacity of more than five cartridges, unless the magazine is modified with a filler or stop that cannot be removed without disassembling the magazine;
5. Contrivances designed to silence, muffle, or minimize the report of a firearm;
6. Poisoned projectiles, or projectiles that contain explosives; or
7. Pitfalls of greater than 5-gallon size, explosives, poisons, or stupefying substances, except as permitted in A.R.S. § 17-239, or as allowed by a scientific collecting permit issued under A.R.S. § 17-238.
B. An individual shall not place substances in a manner intended to attract bears.
C. An individual shall not use manual or powered jacking or prying devices to take reptiles or amphibians.
D. An individual shall not use live decoys, recorded bird calls, electronically amplified bird calls, or baits to take migratory game birds, as prohibited by 50 CFR 20.21, revised June 14, 2001. This material is incorporated by reference in this Section, but does not include any later amendments or editions. A copy is available from any Department office, or it may be ordered from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402.
Most of all have fun with your hunt.
