I called Ruger a couple of days ago because the rings that came with my 77/17 HMR were high rings and I needed medium rings. The friendly lady on the phone was very knowledgeable and helpful. She said a set of medium rings would be sent right out and when I received them, just send the high rings back to Ruger (even though I had opened the package before I noticed they were high rings....Ruger catalog says all 77/17's are shipped w/ medium rings). Anyway, I'm getting the rings I need at no charge except for the cost to send the others back to them. I would have to put Ruger in the same customer service category with RCBS and Leupold and that's some pretty tall company!