Ummm, what?
Bill Ruger is responsible for 10 rounds. In 1989 the 5 round limt was tossed around. Bill "Honest Man" Ruger proposed 15 thinking it would save his Mini-14 and Mini-30. 15 was used as a magazine limit in a couple of states.
10 began to be used as a compromise in a number of states and then became federal.
Pretty much, Ruger was the rep. of SAAMI. They thought that if they set the
limit it wouldn't be too bad. It didn't work, it got cut to 10.
This shows that there is no negotiating with the gun grabbers.
Bill tried it, and regretted it, and became one of the most controversial
subjects in firearms history.