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The Ultimate Reloading Manual
Wolfe Publishing Group
  • reloading manual
  • alliant reloading data
  • reloading brass
  • shotshell reloading
  • bullet reloading
The Ultimate Reloading Manual
hodgdon load data

.45-70 Government Trapdoor (using Hornady bullets)

Author: Brian Pearce / Wolfe Publishing Co.
Date: Mar 29 2016

The US Model 1873 Trapdoor Springfield rifle was originally designed for black powder but it will handle low-pressure smokeless powder loads safely. Suggested "starting" loads should not be reduced, or erratic ignition may occur. Maximum listed loads are developing around 20,000 CUP, the same as factory loads, which should only be used in rifles that are in good, operable condition. Do not exceed maximum loads.

The 325-grain Hornady FTX features a bullet ogive (or nose) length that exceeds industry overall cartridge length when crimped in the cannelure. To assure cartridges will function correctly in all rifles when using this bullet, Hornady suggests trimming cases to 2.040 inches resulting in a cartridge overall length of 2.590 inches and is the specification used to develop the accompanying data. However, many single shot rifles, such as the Model 1873 Trapdoor Springfield, will accept the FTX when loaded in standard length (2.105 inch) cases. There was little, if any, ballistic change with the slightly longer cartridges.