If it is tight and locks up solid….you can shoot whatever would be standard loads when it was made. And 2 3/4 dram loads were common when it was original. Todays 2 3/4 dram loads are little different. If it locks up tight, then the condition of the wood, especially the heading up to the receiver is something that should be evaluated. An easy fix if it has softened from oil or has developed cracks.
If the lock up is weak, then it would be no different than one which needed work today.
Solid Parker’s are frequently shot with todays regular offerings
Addition: After all this time, the insides should also be cleaned and lubed if it hasn’t been done in years.
Just noticed..."Marlin" LC's are not all that old as far a using modern steel.
Last edited by battue; 05/02/22.
