gleason.chapman
45-70 Caliber 300 Gr. Partition Protected Point 50ct.(50 count)
Specifications:
Ballistics
B.C. 0.199
S.D. 0.204
OAL: 0.830"
45 Caliber 300 Gr. Partition-HG Protected Point 50ct.(50 count)
Specifications:
Ballistics
B.C. 0.199
S.D. 0.211
OAL: 0.840"
Looks like the regular hand gun is the longer and to get the .458 they shorten the bullet and make it thicker... Probably - a slightly thicker copper jacket to stand up the the possible added velocity of the 45-70, especially in a modern smokeless 45-70 or maybe even your savage...