If you look at some of the recent posts lately, yes it does happen. As already mentioned there are several ways to deal with this. If you look at the layout of a rifle, there isn’t a lot of room, if the barrel gets lowered into the stock ( more so then planned) there’s an issue. On precarves, the lock prep can be slightly too high in the front not giving greatest location for drilling front lock bolt. Sometimes while drilling, things just don’t go as planned ( Murphy’s law comes into play). Sometimes due to the nature of the woods grain, the drill bit wanders while drilling for ramrod. It’s the nature of building, things don’t always go as planned, so you have to make the best of the situation. It doesn’t make the rifle inferior, just shows man made, not mass produced on multi million dollar machinery.