For real penetration with a .45-70, try our method of vetting bullets for an Elephant hunt.
Target = 5/8 inch steel plate
Rifle = 1886 .45-70
Bullet= 450 grain Punch
Velocity of load= 1800-1900 fps
Range = 50 yards
Process = Fire
Result 1 = .458 daylight hole in plate
Result 2 = frontal brain shot went through head into body = DRT
Steel plate is fairly accessible! I’ll be looking at EBay and Amazon for an elephant! 😂 memtb