Forget about the AR-15 (5.56mm/.223cal). It is sensitive to dirt and carbon buildup. The .308cal on the other hand is heavier but accurate, easy to maintain in the field, & more reliable than most weapons.

The M-1 Garand (.30-06cal). It's main drawback is the weight and 5 round magazine.

I've always felt good with an FNL (7.62mm) in my hands. It has a bit of weight but is reliable and easy to maintain.

If the ranges are no more than 100 yds maximum that you expect to need a rifle for, then you might look at the M-1 Carbine (.30cal) or similar type of carbine.

take this FWIW to you.