This combo gun has worked well for me for many years:

A scoped Savage 24 Turkey gun with .22 Hornet over 3 inch 12 gauge.
The scope is made for turkey hunting with crosshairs and a circle that indicates whether the turkey is within shotgun range.
This combo has taken many wild turkey and varmints in Texas and some prairie dogs in NM where the above picture was taken.

The scope is also useful with the 18 inch .45-70 barrel insert using 300 grain ammo at 100 yards, allowing good minute-of-deer accuracy. The short barrel within a longer barrel also muffles the report and does away with any muzzle flash.

The gun came with factory sling swivels mounts which allow the gun to be slung over the shoulder when using a box call or binoculars.