July 17, 2025

The 45-70 and H4895 powder

Here we go. Another Hodgdon extreme powder suggested for reduced loads with the 45-70.

Hodgdon actually recommends 60 percent of a max load as a reduced load for this powder.
So, for some loads in the Hodgdons "magazine" we get: 

H4895 300 grain cast LFP  50.5 grains --> 30.3 grains
H4895 385 grain cast LFP  47.0 grains --> 28.2 grains
Interplating for a 350 grain bullet we get 29.1 grains. I should try this for my 350 grains plated Berry's bullet.

Apparently this rule applies to H4064 as well.

Hodgdon's statement - verbatim, posted 4-2023, copied 7-17-2025

Hodgdon Powder Company has found that H4895 can be loaded to reduced levels. H4895 was chosen because it is the slowest burning propellant that ignites uniformly in reduced charges. To create reduced loads, the 60% formula is recommended. Find the H4895 load in the Reloading Data Center for your caliber and bullet.

Take the maximum H4895 charge listed and multiply by 60% (.6). The load may be adjusted up from there to achieve the desired velocity and accuracy.

This works only where H4895 is listed. DO NOT use in a cartridge where H4895 is not shown. Example: 30-06 cartridge with 125 gr. Sierra SP bullet. Max load shown in the Reloading Data Center with H4895 is 53.7 grains. 53.7 X .6 = 32.2 grains. The shooter begins with this load, and may work up from there to obtain the desired velocity and accuracy for his reduced load.

Call Hodgdon Powder Company if additional information is needed, 913-362-9455.

Feedback? Questions? Drop me a line!

Tom's Computer Info / tom@mmto.org