I'll put my money with Jmoore, and say anything under 2 MOA is great, and that other factors will stop you realizing groups much better than about that or a bit less if you're lucky. Best barrel, best bedding, best outfit all round I don't think you'll ever get a rifle No4, in .303, in full wood that is an honest reliable sub MOA performer through a 10 shot string. You might, but I'd like to see it.