i have a faulty bx-25 mag that i had tested in several ways to be sure it was the magazine that was causing so many malfunctions. well, there is not doubt at this point that it is a defective magazine (my other b-25 is flawless).
i emailed ruger with no details and just asked if they would replace the magazine i felt was defective. they replied in a fairly quick manner, asked no questions, and just told me to send the mag to them for replacement.
i will return and report if they followed through and replaced as they said they would. as of now, i give their customer service 5 stars! i appreciate companies that stand behind their product so i wanted to report the positive experience.
EDIT NOTE: i had called ruger before and felt the experience was mediocre. this contact was through email, and it was outstanding. i can't speak in this post of their phone services at this time. also, in the past i have some issues with their policies, but i feel it is only fair to report this positive experience.