Over the last 70 years, Hodgdon Powder Company has grown into the preeminent supplier of gunpowder and blackpowder to handloading and muzzleloading enthusiasts. Along the way, Hodgdon Powder Company has also acquired the IMR® and Goex® brands, as well as licensing the Winchester® Smokeless Propellants brand.
Warranty / important information
Hodgdon® Powder, IMR® Powder and Winchester® Powder expressly disclaim any and all warranties with respect to any and all products sold or distributed by them, the safety or suitability thereof, or the results obtained including, without limitation, any implied warranty of merchantability or fitness for a particular purpose and/or any other warranty. Buyers and users assume all risk, responsibility and liability whatsoever for any and all injuries (including death), losses or damages to persons or property (including consequential damages), arising from the use of any product or data, whether or not occasioned by seller's negligence or based on strict liability or principles of indemnity or contribution. Hodgdon®, IMR® and Winchester® powders neither assume nor authorize any person to assume for it any liability in connection with the use of any product or data.
For those loads listed where a starting load is not shown, start 10 percent below the suggested
maximum load and then approach maximums carefully, watching for any sign of pressure
(difficult extraction, cratered and flattened or blown primer, and unusual recoil).
Trail Boss® was designed to work in specific charge weight ranges. Do not use charges less
than the starting load shown, nor greater than the maximum shown.
For plated lead bullets use existing lead bullet data for the same weight plated lead bullet.
When an asterisk (*) appears in the title of the cartridge, or in the data, refer to the warning page.
40 S&W: This data is intended for use in firearms with barrels that fully support the cartridge in
the chamber. Use of this data in firearms that do not fully support the cartridge may result in
bulged cases, ruptured cases, case-head separation or other condition that may result in damage
to the firearm and /or result in injury or death of the shooter and/or bystanders. Check with your
firearm manufacturer if in doubt.
45 Colt: 45 Colt data is listed in two categories. The first is intended for original Colt revolvers and their replicas. Max pressure, is 14,000 CUP. The second category is 45 Colt (Ruger
Blackhawk, Freedom Arms and Thompson/Center Contender/Encore handguns. Max pressure, 30,000 CUP. Do not use these data in any other make or model of firearm.
45-70 Government data usage: 45-70 data is listed in the following three divisions based on pressure levels for only the firearms intended:
45-70 Government (Trapdoor Rifle): These data are intended for Springfield “Trapdoor”,
Rolling Block and Antique Replicas. Max pressure, 28,000 CUP.
45-70 Government (Lever Action): These data are intended for the 1895 lever action
Marlin, ONLY. Max pressure, 40,000 CUP. Do not use these data in any of the firearms
listed in the Trapdoor section.
45-70 Government (Modern Rifles): These data are only for Ruger No. 1 and No. 3 single-shot rifles, Browning 1885 single-shots and Siamese bolt-action rifles. Max pressure, 50,000 CUP. Do not use these data in either of the prior two sections of 45-70 data (Trapdoor and Lever Actions).
26 Nosler and 6.5mm-300 Weatherby Magnum: Do not reduce starting loads, as doing so can result in pressure spikes that may result in damage to the firearm or injury to the user and/or bystanders.
Max loads listed that show an asterisk (*) following the “C” for compressed loads with IMR 7828 SSC will not fit with the standard IMR 7828. Reduce by four percent.
Do not use pointed bullets in any rifle with a tubular magazine, unless that pointed bullet was designed with a collapsible tip, made for tubular magazines.