Glenn Villeneuve’s rifle is Rugger M77 MKII with an SRT Shadow XL Ti suppressor that uses 30-06 cartridges.
https://www.earnthenecklace.com/glenn-villeneuve-wiki-net-worth-life-below-zero/
This is from his facebook Q&A:
My Rifle: I get many questions about my rifle. I shoot a Ruger M77 MKII in 30-06 with a Leupold 2-7x scope and an SRT Shadow XL TI suppressor. I bought the rifle new in 2003 for $550 and it is the only center fire rifle I've ever taken game with. Before moving to Alaska in 2000 I'd bought a Savage in 300 Winchester Magnum but lost that rifle when I tipped a canoe over while paddling up a creek in the Brooks Range. I replaced it with the Ruger 30-06 after asking my friend Jack Reakoff for his advice on hunting rifles. I told him I was looking for one gun for all big game, from Dall sheep to grizzly bear. I consider my rifle to be among the best purchases I've ever made. I had the barrel threaded and added the suppressor in 2013, to protect my hearing, and I'm very happy with that decision as well.