It would seem a 10 round mag would be nice if all you had time to do was grab the gun with what ammo was on board and run.
The bolt gun is less prone to breakage ,
as for need in a fight , a scout ( person by himself in hostle lands) would be expected to avoid contact with superior forces . The bolt gun with long range accuracy 400-500 yards would be handy to snipe and run where useful. Say a small group was tracking you ,a well places shot may slow them down or cause them to cut and run .
like mentioned any ammo , weight etc all play a part.
I wouls add a well sighted rifle with a scope mounted by way of a picitnny rail could be stored in much less room than an AR-10 or anything. Also it looks like a hunting rifle not what some would precieve as a machine gun.
add a 10 mm Glock and the guy would still offer alot of fire power.
I know its tatical these days its the buzz word. But what Ruger has is a good "walking rifle "