In the 1920s, American gunsmith A.O. Niedner began necking down the .30-06 Springfield to accept 0.257-inch bullets. His new round, the .25 Niedner, gained a bit of a following, but there was a problem: With the propellants available at the time, the Niedner didn’t offer that much of a performance advantage over the popular .257 Roberts.
Slow-burning propellants changed that, and when pushed by powders like IMR 4831, the .25 Niedner was suddenly a far more substantial cartridge than the .257 Roberts. Remington adopted the cartridge in 1969, renamed it the .25-06 Rem., and began chambering it in Model 700 rifles. The .25-06 won its share of fans. While Jack O’Connor had his .270, other writers of that era like Bob Milek thought the .25-06 to be even better medicine…
