I never ran across that Winchester load, but it was a cranky .41 FG that bought me to the Marlin forum. I was having a great time with the "jam" and got a lot of good advice on curing it. As long as I stuck with round nose profile bullets it was fine, load a swc and hang up every one on the chamber mouth. One of my favorite loads is an LBT wfn, 265 grain bullet, until I made one more change it was a single shot proposition. Then Ranger Point bought out that extractor they designed. Now my FG feeds everything that I feed it, from 210 grain to 295 grains and no complaints. That rifle was always my favorite Marlin, and I expect it always will be.