Home Forums Hunting & Shooting Express Rifles and Big Bores Only The great 458 Winchester. Everyone should own one at least once

And of course this inspires the .45-70 Long Throat Plus (45-70 LT+)
which is a re-throating of Bob Mitchell's .45-70 LT with the .458 WM throat.
A one-piece reamer would be nice, to increase the case mouth diameter to same as .458 WM: 0.481"
Rechamber any .45-70, or re-barrel, with any .457", .458" or .459" grooved barrels.





Bob had a .45-70 LT load (that he used in a Ruger No. 1) pressure tested by the Accurate Powders folks,
and was getting very near SAAMI .458 WM ballistics at acceptable pressures,
with a little less throat than on the .45-70 LT+.

But, even the unadulterated .45-70 Govt. will Bagwell with the BHN-10 480-gr PH bullet at 1300 fps.
Saint Bagwell specified a smokeless load with that bullet: 38.5 gr of IMR-3031 for 1350 fps.
Bob Mitchell has touted the 480-gr DGX as a substitute for when the proper FN cast bullet is not available.
The gilding-washed, steel-jacketed 480-gr DGX-Bonded will tolerate being driven faster for sure with 2.780" COL in the .45-70 Govt. lever action or single shot.
For extra flare, adding the longer throat effectively increases case capacity and reduces pressure.

In the bolt-action or single-shot .458 WM and .458 WM+ with 480-grainers of any type, 1300 fps to 2300 fps is plumb tropical.