I am new to this forum. I have a Marlin 336SS and a Marlin 1895SS in .44 Mag. I had the Marlin 336 .3030 first. It worked fine and one day it started to double feed and lock up. I sent it back and now it’s fine 25+ year’s later. The Marlin 1895 .44 has always functioned properly, is absolutely accurate and has provided many a meal. The Marlin 1895 will feed, load and devour a mix of .44 Mag and .44 spec. loaded together. I just bought a Henry .44 side gate NIB on Gunbroker. Color case hardened beautiful wood, beautiful gun. As I was checking it out it double fed. Didn’t matter what type of ammo or wether it was .44 mag or .44 spec. I never got to shoot it yet. It’s been sent back to Henry and I’m sure it will be fixed. Here’s the point, my Marlins are absolutely reliable, accurate and smooth whether you lever them slow or fast. We’ll see about the Henry when it returns.