Many are reporting FTF problems.
Some of those mention the second round in a fresh mag of 10 as being the issue. Others feel it might be related to difficulty getting the recoil spring fully seated over the ridge and against the rim of the rod. Some, including myself, report seeing fewer FTFs if we carefully load the mag under pressue (ie, don't use the slide button too much if at all) and make sure the last rounds in are properly aligned.
Still others think it may be the standard issues . . . breakin, failure to clean/lube a new weapon, or ammo related. But many of us with frequent FTFs are welll beyond having those issues.
Personally, I think there's some kind of an issue with ammo seating in the mag since my FTFs are now, after 700 rounds, almost exlcusively on the second round. Mag issues might become more apparent as the mag ages.
I've decided to track my own issue a bit further before calling Ruger - the gun is new, after all, and they are busy enough handling orders. YMMV.