Ive lived on the NW Arctic Coast for a while, a guy notices what the other fellas around you use and why, allot of what is said is like a local rumor thers a grain of truth to some it,
I do know of a few guys useing the Ruger Mini -14, mainly for shooting wolves ($400 with legs) primarly hunted for the money and the chase, wolverene and Lynx secondary, they may shoot a fat caribou if one happen's to be around & they have room on the sled the
I'd say the most used round here is the .243 Winchester,
with polar bears sticking to the sea Ice (what ther is of it) staying by ther food source, and the other two types denned up for winter ther is no call to pack heavy artillary till they come out there dens, by then pelts arnt much and the snow's punchy so ya go ice fishing instead
there was a fella in Noatak that used only a .22mag (H&K300) took allot of caribou, a 870 Remington 12ga was all he needed, he claimed the .243 was a little light on bear.
Allot carry the smaller calibers because there more concerned with accuracy than power.
they rather shoot 2-3 .223 rounds in vitals than mess with recoil of a 30-06 or 270,
these guy's make do with what they have, a box of .223 Rem is $28, a box of 30-06 $43, gasoline is $6.40 a gallon at the pump, 2-cycle mix oil is $15 a quart, 70% the regions households have only one breadwinner or seasonal source of income, most folks are in some sort of Govt assistance program of one type or another (WIK, Heating Assistance, Quest Card)
Ive seen allot of .22Hornet on the shelf (50 count box for $65) and .17Rem but these are mainly used for seal hunting not caribou.