If memory serves me,that 45-70 was blown up using the wrong powder..AA7 instead of RL-7.The guy just grabbed a can with a 7 on it...
The Marlin 45-70 is plenty strong..There are documented cases of using the wrong powder (again) and locking it up only to have a smith fix it and estimate the pressure to be in the 80K range with no harm done ater the mishap.The guy is still using that Marlin as far as I know.
Test were done for the 454 Causll in a levergun using one Marlin and a couple Winchester '94's and the Marlin lasted somewhere around 20 rounds of 62K+ shots only to fail to lock up properly after.The Winchester '94 lasted about 40 shots and again,if my memory serves me,the action was mangled with the same loads in the 62,000 PSI range to mimic the 454 Caull.
If anyone thinks the Marlin 45-70 is not strong,they need to re-think..Buffalo Bore loads a 300 grain Speer Unicore to 2350 fps for the modern 45-70 and Wild West loads there '95 actions to 45 CUP.
There plenty strong....You can't get enough powder(for 45-70 use) in a case to blow one up.You may have issues but it won't blow like that picture.You can't get a double charge of powder used for reloading 45-70 rounds in a 45-70 case reguardless of which case and I am not talking pistol powders some choose to use..
As measured by Brian Pierce!!!
1-.450 Marlin Brass/73.5 grains of water (2.7 grains less than Remington 45-70 Brass!!!)
2-.45-70 Remington Brass/76.2 grains of water (1.3 grains less than Starline Brass)
3-.45-70 Starline Brass/77.5 grains of water (2.8 grains less than Winchester Brass)
4-.45-70 Winchester Brass/80.3 grains of water (4.1 grains "More" than Remington Brass)
Jayco
