The .357 Herrett
By Chuck Hawks
Another successful collaboration by grip maker and wildcatter Steve Herrett and gun writer Bob Milek resulted in the .357 Herrett single shot pistol cartridge, introduced in 1974. T/C barrels in .357 Herrett became available shortly thereafter.
The .357 Herrett is intended to provide greater killing power for big game hunting than the successful .30 Herrett of 1972. It is a good choice for medium to large CXP2 game.
Like the earlier cartridge, the .357 Herrett is based on a shortened .30-30 (or .32 Special) case. The shortened and reformed case is necked up to accept .357-.358" diameter bullets. Like the .30 Herrett, it is intended for efficient performance in 10-14" pistol barrels.
The .357 Herrett case is 1.750" long and has a 30-degree shoulder. Overall cartridge length is 2.40". Care must be taken in adjusting a .357 Herrett sizing die to assure accuracy, reliable function, and long case length. This is explained in detail in the sixth edition of the Hornady Handbook of Cartridge Reloading.
The Hornady Handbook suggests that best performance is obtained with heavier bullets (158-200 grains) loaded close to the maximum. 180 grain Hornady bullets can be driven to a MV of 1700 fps by 23.0 grains of IMR 4198, or to a MV of 1900 fps by a maximum charge of 28.9 grains of IMR 4198. These Hornady loads used reformed Hornady .30-30 brass and WLR primers and were tested in a 12" Contender barrel.
Copyright 2005, 2014 by Chuck Hawks. All rights reserved.