As shown in the chart, an 8-grain charge of Trail Boss gave the best results. Testing was conducted in temperatures between 24- and 35-degrees Fahrenheit using a Glenfield by Marlin rifle with a 20” barrel. All loads used a Federal 210 large rifle primer. TestĪs aforementioned, I tested several loads combining Berry’s 30 caliber 150 grain round shoulder bullets with varying weights of Trail Boss. Trail Boss flowed easily through the powder measure, delivering consistent charges. ![]() It is very bulky, so small charges take up a surprising amount of space in a cartridge case. It is primarily a pistol powder but has some application in rifles. Previously an IMR powder now offered in the Hodgdon label, Trail Boss was designed specifically for low velocity lead bullets suitable for Cowboy Action shooting. In a quest to shoot the 150-grain bullet at subsonic speeds, I loaded the bullet over charges of 7, 8, 9 and 10 grains of Trail Boss. One might wonder what these bullets do offer besides affordability - maximum fun in reduced velocity and reduced recoil loads! About Trail Boss The 30-30 can push a 150-grain bullet at 2400 – 2500 fps, so these bullets are not intended for maximum velocity. One item of note: there’s a warning on the box that the bullets are not to be loaded above 2,000 fps. This creates bullet core separation and accuracy issues.įor my loads, I used 30 caliber, 150 grain “round shoulder” bullets specifically intended for the 30-30 Winchester cartridge.
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