Home Forums Lever Action Central Marlin 336 Lever Actions Can I shoot 375 Winchester ammunition in my 38-55 Marlin

I have a new Marlin 336CB in 38-55.

I have read about the SAMMI ~30,000 CUP for the 38-55 Win.

I have also read about the ~50,000 CUP for the 375 Winchester.

I see that the 336 Marlin is chambered in BOTH 375 Win and 38-55 Win.

I know that there are older model rifles chambered in 38-55 Win and these older rifles may not have been designed to withstand 50,000 CUP.

I have read a few times where folks have stated they shoot 375 Win from their 38-55 Marlin 336.

I have talked with a gunsmith familiar with the 336 Marlin and was told the rifle is no different between the two chamberings.

I believe Marlin would default to the SAMMI (and legally safe) specification if I were to call them.

What is the consensus here, is it safe to shoot 375 Win ammunition in a new Marlin 336CB chambered for 38-55 Winchester??