Telling you 7.62x39 is very underrated and abundant.
Took my first deer over 100 yard with a mini 30. Took many a hog with my go to walkabout hog gun, an SKS. The commy 30-30. Loaded up back when a box of ammo was like a dollar at Cheaper Than Dirt back when it reminded you of that mil surplus scene with Michael Douglas in Falling Down.
For a do all truck gun I think a newer mini 30 or even mini 14 is about perfect. I just can't warm up to AR's..