Agree with #4.
The NH M-70 Express rifles have a heavy barrel, probably close to a #5. Mine is .375, so lots of steel in a 24" tube and too heavy.
I cut it to 21" which helped a lot. Sent it to Karl Kampfeld for deep fluting, hoping to lose another 7-8 oz. Waiting for it to return.
I built a .404J on a M-70 RUM and used a Walther barrel, probably close to the #4. At 24", it was about right.
DF
