Brand new, it will likely be MOA-ish, from what I've seen with mine, and heard from others.
Ruger has realized that good barrels sell, and for the past 20 years or so, since they started making their own, their barrels are usually very good. If you like the rifle, jump on it.
To elaborate, I don't think the 1A's are quite as accurate as the B's or V's, on average. But I'd only worked with a A in .30-40, and a #1S in .45-70, both black pad, Ruger-made barrels. Both of them are around 1 to 1.5 MOA with selected loads, and that's what others have reported for similar rifles. Several of my B's or V's are sub-MOA with their best loads. And I have a 1S in .475 Turnbull that is about the most accurate big bore rifle, of any style, that I've ever seen.
