Really?
Velocity/Energy
.44 Rem Mag - Muzzle:1230/806 100yrds: 1035/571
.30-30 - Muzzle: 2200/1827 300yrds:1894/1354
.20ga Slug (3/4oz Rifled Slug) - Muzzle: 1600/1865 100yrd: 1068/831
Firstly, that's handgun velocity. Add at least 400fps for rifle length barrels.
Secondly, energy is so meaningless in a discussion like this it doesn't even bear mentioning. It is too velocity dependent and energy ain't what kills critters. It is the worst possible figure to use when comparing big bores. A 250gr .44 or .45 cast bullet will penetrate end to end on any deer that walks and kill it graveyard dead but delivers a dismal 450ft-lbs of energy. By the logic of energy worshippers, it should just bounce off.
Thirdly, it does not take bullet construction into consideration at all. Slugs have a terrible sectional density (your 3/4oz is comparable to a 185gr .45 jacketed pistol bullet) and can't be counted upon for much penetration.
No sir. Slugs work within their limitations, use them where you have to but there is no way to prove that they are "better" than a proper rifle. Even one chambered in a pistol cartridge.
CraigC SABOT not slug ,big differnce. Sabot do work well out to the longer range than slugs and factory 44mag ammo except for handloads maybe or BB. Not talk'n about what your 38-40 or anything other than 44mag in a comparison. We are not comparing your 38-40 to anything, that would be a new tread. craigc remember this is about 44 mag rifles and 20ga , got it. Not all lever guns in general.
Yeah and most your good sabot rounds use, wait for it.....pistol bullets! So why not utilize a proper platform for launching them?
I made the point about the .38-40, which you obviously missed, because even at half the pressure of the .44Mag, it produces some impressive velocities for what is essentially a pistol cartridge. The .44 is capable of much more, easily equalling the velocity of your precious sabots without beating the shooter to death.
Uh, got it?