Shotguns make sense and do appear in the lore, mainly in the form of blunderbusses for lowly Orks and Grots. Sniper Rifles on the other hand would be like giving swords to Tau or testosterone to Eldar, just wrong.
Maybe we Orks cant use sniper rifles, but those who like close quater combat and hard hitting weapons should be given a shotgun
we need dem double barrels ladz! demz proppa boom! View: https://www.youtube.com/watch?v=2gSf5UMZ8ms deyz good fer 'andlein Chaos gitz
Actually, sniper rifles for Orks are in the lore; mainly for Lootas; looted sniper rifles. Hence, for da Orks, perhaps it is more lore-approriate if sniping is left to their support classes (Painboy and Loota/Deffgunner) Ya see lad, sum of the time, ya wanna get som'Git, but the git be all runny like some pansy. Maybe it is a pansy! ye. Wot are yer gonna do? Run afta him fer uuh hours? Naah, mate, wot you gonna need, is some aimy-wot-knots and precisiony-doo-dats. Dem pansy aint gonna be all runny-like wit sum huuuge snipa rifla bullet up his pansy arse. And then its clobbering time, see!