A friends son stopped by today. He asked about a 300 Win Mag. Barreled to shoot light bullets at groundhogs. I played around with 30 caliber Varmint projectiles. Mixed results on my part. I love the 243 Win for GH's. I thought a fellow here from Virgina? Built the first groundhog devastator rifle. Anyone else know of this project, or links to similar ? Thanks in advance, mike in ct.