The thing to remember, is that even if they don't shoot 1/2 MOA in your rifle, is that they will likely shoot well enough to put them all in the boiler room of whatever big game you're going to point them at. So, 1-2" will work fine, even if it might not be what we all might be striving for...I wouldn't worry about it one bit, as long as they don't scatter all over the target, and since it's Black Hills, that would be very unlikely....
Tom