I was looking at buying one of the speed feeders for my Marlin 60 but hit on an easy solution this weekend. The shaft of an aluminum arrow (check shaft size) fits perfectly into my model 60 and if loading 14 rounds you can get 2 tubes out of one shaft. It works really slick and you can carry multiple tube in a cheapy quiver when gophering. Just and idea I thought I'd put out for the rest of the tube mag owners.