i left an AR-10 chambered in a 243 WIN. this AR had a Nightforce scope attached ,so i left this AR outside at my cabin it was -30 below for 12 hours then shot rifle still hit target well at 300yards and empty case ejected just fine so i shot the AR-10 again and it still shot well and ejected the empty case. i was testing this rifle AR10 /243 Win. for future coyote hunting in the cold . My test was done by the Canadian border in Northern Minnesota it gets dang cold up there.
Last edited by pete53; 11/30/20.
