Ruger's system is indeed strong and secure. Nevertheless, I have a set of Burris' Ruger-to-Weaver adapters, which I got because I wanted to be able to use Burris' excellent Signature series rings, with the offset inserts. I also wanted availability of lower rings than Ruger offers (in 30mm specifically). However, the adapter system adds enough height that I can't get low enough rings to get me any lower than Ruger's lowest 30mm option, which is too high already for anything smaller than 50mm objective scopes.
Once Conetrol gets back up and running (the owner died this fall, and the family says they're regrouping and going to re-open the business), they'll also have Ruger options. Conetrol mounts are outstanding, and will allow lower mounting heights than Ruger does, at least for 30mm, but they're beautiful rather than tacticool, if that's what a person is looking for.