I don't know who all made barrels for them,but I'm pretty sure Wilson made some of them.I have had experience with several of their barrels,and if there was a good shooter,it probably had a Wilson barrel on it.Their barrels shoot very good.A lot of those Rugers had bedding problems and the triggers were usually pretty nasty.I bought on of their Precision Rimfires a few months ago,and it's already spending too much time in the safe because of its trigger.Not terrible,but certainly not in the same class as my 541S Remington.A good shooting bolt gun needs a good barrel,a good trigger and proper bedding.The tang Rugers were lacking in all three.At least the half a dozen I had(note had) were.I haven't shot one of their later rifles,so I can't say anything about them,but the tang safety models wouldn't shoot as well as their competetors' rifles.In those days,a M700 was a far better rifle,but they let their quality slip and Rugers are probably sitting in a lot of safes instead of Remingtons because of that.