I'll probably try out some American Eagle, and some Golden Bear. See how those pan out.
I've heard of people getting good accuracy with 7.62x39 in the AR, in the 1-2 moa range.
I knew going in that Tula was the cheapest ammo, so I didn't buy 1000 rounds or anything like that.
I've got about 300 rounds of the Tula left. Even at 4 moa, it's fine for offhand practice, or taking for a hike for a defensive load.
