gulo:
The 1895 Marlin in 45-70 and 1895 in 450 Marlin are NOT the same. While the outer appearance is the same, the metallurgy in 450M is not and the 450M barrel to receiver threads are "v" cut instead of the 45-70's "u" cut. That is also why there are different SAAMI specs. The 45-70 in the Marlin 32K psi and the 450M is 43K psi
Do as you wish.
