I haven't started loading for it yet. It came with 2 boxes of custom ammo by Quality Cartridge using reformed .444 Marlin brass. I have the better part of one box left to start hunting with if I don't get handloads worked up in time. Proper headstamped brass is available from Horneber & Bertram but at $42-$60 per 20, I'll likely neck down .444. C-H has dies and the oddball .356" bullets are available from Hawk and Buffalo Arms. I may also get a swage die from Corbin and squeeze down common .358 bullets. I haven't done any serious grouping with it yet because of my limited ammo supply at the moment but so far it shows promise, especially with only a 3x scope. Will report back when I've spent a little more range time with it.