Schuetzendave wrote on Apr 12
th, 2018 at 6:10pm:
The person who used the 5744 in the Pedorsoli used more powder than the maximum specified for the bullet she was using.
Just a quick correction here, the Lady that had the rifle blow up was shooting a Marlin Ballard, that had been relined, and had been used for many years. Her load was right at or maximum. There was apparently an old crack under in the receiver that finally let go.
The Pedersoli that blew was being ran by a man. The chamber had been rung by the use of wads and smokeless powder.
Now as to chamber length, there's the 40-65 winchester and marlin chambers, then you get into the bushes with various "40-65" chambers that have length's all over the place. The 40-65 RL one of the most common encountered is simply the result of a 45-70 case ran into a 40-65 size die and shot as is, other's are derivatives of that and the case needs be trimmed after sizing.
Chamber casting a "40-65" is a grand idea, if you're not the original owner of the rifle, as it's hard to tell what someone has been doing inside that chamber with a reamer/drill bit, etc.
Smokeless powder and wads are never a good thing.