I don't know a great deal about the history of the Win Model 100. What I do know is that in the late 80s or early 90s, they were the subject of a recall. Some problem with the firing pin, I believe.
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman