I do not know the actual numbers, but let's speculate 1% of the first 5000 new RRLs had problems.
I would expect at least some initial issues with a new line and new tooling. A lot of effort went into the re-release. Dwight Potter was hired away from Browning in part, I suspect, for the Red Label II project. In 2013, Ruger manufactured and sold 2,294 shotguns, according to the ATF, and the new Red Label was released late that year. the Euro and the Japanese yen makes this goal much more difficult than it was just a year or two ago.
They no doubt are and were well-aware that they need to be under the mid-range market leaders (Beretta and Browning) in price point, as well as actually make money, in order for the new Red Label II to be sustainable. What happened? In short, Ruger simply miscalculated the cost of production.
