I have heard many complaints about Ruger rifle accuracy. But I have been using various Ruger rifles, mostly #1's, since 1972 and have yet to encounter one that won't shoot. However, all the ones I've used were used with handloaded ammo, not factory loads. I don't know how much of a difference that makes, since at least in the beginning, all of them were fired with ammo originally loaded for other rifles. However, tailored loads were developed as well, and with these most of my Rugers shot MOA or better. The best one was a 1B in 7mm Rem Mag., which started out shooting 1" groups AT 200 YARDS.

Without knowing what, if anything, has been done to your rifles to make them shoot, I can't give much in the way of suggestions, other than to recommend trying to develop some handloads for those rifles that will give better performance.