I have read many posts about bbl threads on the marlin in 45/70 not being very strong.
Some have said they split at the threads.
I wantd to get a 1895G 45/70. but am now looking at the 1895M because some said it is stornger all around. I know the pros and cons about both calibers. I'm getting ready to buy.
so please somebody tell a newbe the rigth
thing on this subject.

"Some have said..." Yeah, perhaps with gross over loads. My 30 year old Marlin 1895 has seen its share of 40,000 CUP loads and no signs of a split anywhere. Feed the 1895 45-70 the right diet and it will last several lifetimes. You'll wear out the barrel before anything splits.

As far as I know Marlin uses the same 336 action for the 30-30 and 45-70. The loading and ejection ports are opened up to accomodate the 45-70's greater size but the receiver/barrel dimensions and tenon threads remain the same. I'm in the process of re-barreling a 1895CB, 45-70. The tenon OD is .775" with 12 square TPI and threads are .0325" deep. As for "splitting at the threads"... that WOULD be the weak area since the chamber wall is only .120" thick there. One thing Marlin could have done with the 336/1895 receiver is use 18 or 20 TPI 60 deg. "V" threads instead of the deep cut square ones. Oh well...

Jon