Ruger Mini-14 and Mini-30
Well, mixed results....
My Ruger 10 round mag was a bust. Continuously jammed using the 10 rounder. This was the first time I used it. Got it on eBay without package. Switched to a Ruger factory 20 and it fed perfect for about 150 rounds....
Next, it did not like my 77 grain handloads...