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I am in the process of setting up to load some Laser-Cast 300 gr .459 bullets for use in an old Springfield carbine. It's the 1881 version owned by a friend. In the Hodgdon Reloading manual it lists 14 gr. of Trail Boss as a starting load with 1199 fps and 19,400 CUP pressure. Would that be okay for this gun? He uses it solely for plinking. I know I had some W/W 300 gr. hollow point factory loads he used one time and he said they seemed to be a bit stout for the carbine. I know Hodgdon says not to go below the minimum load listed but I was wondering if any has tried lesser loads with Trail Boss for the 45/70?

Thanks in advance for advise

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14 grains is the start load recommended by ADI (The maker of Trailboss). It should be just fine if the .459 bullet is large enough in diameter. Some of the old Springfields have pretty large groove diameters.

10-11 grains of Unique works very well also; it will give you about 1000-1080 fps.
 
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