One thing that I failed to mention… Jim’s .45-70 Marlin was crazy smooth.  The action felt like a Henry Goldenboy, it was so slick.  None of the rough grittyness that is typical of a Marlin, in any caliber. 
My own Marlins never felt half as good.  My Rossi M92 .44 Mag feels really slick and smooth… But not like Jim’s.  He’s been running Slipstream for a long time through that gun, letting it really work in.  Mine will get that way eventually, given some more time.  You feel the new Marlins we have at the store… Slipstream makes a new one feel just plain sad.
Marlin should be using Slipstream at the factory. Just saying.  Because they would then be smoother than a Browning BLR…