So some are suggesting that cleaning the firing pin might help. I dont see that as an acceptable solution at all. I have exactly 115 rounds on my rifle and I've had 5 failure to fires. There is no way my bolt has gotten dirty enough to cause issues with less than 100 rounds down the tube and exactly 3 range sessions. And if it has, that's not an acceptable piece of kit for me.
As far as it being an issue with Timney triggers, I had a buddy have 1 failure to fire with a trigger tech trigger. And even if it is an issue with Timney triggers, so what?
Timney triggers seem to be pretty popular and it seems as if there are a couple of Remington footprint and clone receivers out there. I think the PVA John Hancock is going to use timney triggers. If there was a thread after thread here on how Timney triggers cause failure to fire on all of the various actions that are based on the 700 footprint then I would say there is a Timney trigger issue. But I'm not aware of such issues. To me this seems to be an ARC issue. Unless ARC sells their rifles with specific triggers installed or with at least a recommendation that you not use one of the most popular triggers on the market, it is their issue.
With that being said, I dont think its ideal that the solution the issue is to sell the stronger spring. IMO those spring should have been shipped out to every nucleus customer who has reported the issue. But I paid my $17 and will wait to see if it resolves the problem.