Found two brand new Ruger factory made, and stamped on bottom, 20 rd. mags. at my local gun store!! A little pricey, 75.00 ea. But sure worth it to me. Will test them tomorrow and let you know results.
I just bought two ruger used mags. The 30 round mag. has the Ruger name and logo on the mag. body plus the bottom of the mag. The 20 round mag. has no marking's on the body, but has the Ruger name and logo on the bottom. Has anyone run into this?