Purchased my first for 35rem in a 336 with a tube magizine. It works great, specialy because I only partialy resize my brass for better chamber fit/head space. When I started loading the 358win with cannelured bullets I bought another,again it works great even with non-cannelured bullets.

For a tube magizine I think its tops and can give you more uniform stating pressues and thus better accuracy. You have already tyied the roll crimp the lee factory crimp is something to try and they don't cost much, so why not?