10mm vs 44 MAGNUM Shooting at 3/32 of inch metal plate - Duration: 7:15. drsjr1969 1,233,525 views. ... Shooting the Uberti 1873 44-40 lever action Winchester to 300 meters - Duration: 8:11.
As said, it should not be possible to shoot .44 Magnum in a .44-40 and would be dangerous if you could cram one in or ream the chamber to an odd mongrel shape. It is not even wise to shoot hot .44 Magnum loads in a rebarrelled .44-40. The barrel shank is small and the receiver ring is thin for those pressures.
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The .44 Mag is Elmer Keith's gift to us based on a lengthened .44 Special and loaded to much higher pressures than ANY of the old guns could stand. The .45 Colt was a military caliber whereas the .44-40 was civilian. Colt produced SSA's in both calibers due to the demand from civilians for a rifle/pistol combination that fired the same ammunition.
.38-40 Winchester - Another revolver cartridge, in this case a black powder number only half as powerful as the .357 Magnum..44-40 Winchester - Notably underpowered compared to the .357 Magnum. I know, the .44-40 has probably killed more deer than anything except the .30-30. However, there used to be a Hi-Speed hunting load for use in rifles.
Also, pressures climb too quickly with heavy bullets in the 44-40 well before velocity becomes competitive with the .44 special. I've used both for over 35 years and the 44-40 is for fun and varmints while the special is for game and whatever comes. Overall the .44 special's 250gr bullet is more versatile than the 44-40's 200 gr bullet.
Take a good look at the wall thickness of a fired .44-40 case vs. a .44 mag: the .44-40 was developed as a blackpowder cartridge and in its day (circa 1873) was considered quite a potent round. .44 mag is a strictly modern high pressure round developed for modern smokeless powder.