Marlin Lever-Actions
scwcharlie: I need to add my .02 worth:
You said you had a problem with CHAMBERING, not LOADING. Are you attempting to chamber cartridges with semi-wadcutter bullets? Don't! They're too damn hard to get into the chamber, regardless of whether a Marlin or Winnie. Use round-nose FLAT-POINTS (lead or jacketed)!
Mr. Traveler said Marlins are sensitive to cartridge length. ALL LEVER-ACTIONS are sensitive, in that the cartridges can't be too long.
Not ALL Marlin 357's are hard to load 38's. Mine does just fine. Again, choose a round-nose flat-point bullet. It might make the difference.
DO NOT put cartridges with round-nose bullets into the tube. As Mr. ranger7 said, the bullet tip of one cartridge MIGHT set off the primer of the cartridge in front of it. I've seen it happen. Wouldn't matter whether the rifle is a Winnie nor a Marlin.
If you have plenty of 357 cases, use them & don't worry whether it will or won't feed 38 cases. You might lose maximum loading capacity of one cartridge.
And before someone else brings up the subject, yes, Marlin's Micro-Groove rifling will accurately shoot lead bullets. That's all I've ever fired. Just keep the velocity at or below 1,000 FPS.
A good Cowboy Action Shooting gun smith will know how & where to smooth up the action, which makes a BIG DIFFERENCE. Just working the action to attain the same smoothness would take EONS!! I began CAS in the summer of '83 and only retired from the sport a few years ago. All my Marlin, Winchester, & Henry lever-actions are smooth as silk by having "action jobs" done by competent CAS shops.
I also have a S&W 686. It and the Marlin 1894 are superb firearms!
Respectfully,
H-F Hank
NRA Bene.
USAF Vet