I'm going to to be reloading for a Henry H010 45-70. I have looked in hornady and the Lee manuals but they list 3 different 45-70 types. Which one do I go by for this Henry?  

In the hornady book they have...
45-70 government (trap door)
45-70 government (1895 marlin)
45-70 government (ruger #1)

In the Lee book it has....
45-70 us governement
45-70 model 95 lever action
45-70 modern rifle design

So which one would I pick? I'm thinking modern rifle design?

I would initially begin with the middle ground loads for Lever guns. IIRC the Modern loads are for single shot rifles like the Ruger, and modern bolt actions. In either case it is the safe starting point imho. From what I can see the Henry action looks very similar to the Marlin in that it does not appear to be a toggle action like the 1873 Winchester. If it is one of the "Henry Rifle copies" with the toggle action then you might want to start with the "trapdoor" loads. Not that familiar with the actual inner workings of the Henrys, but I am sure someone with more knowledge will be along shortly. My info is general reloading safety over the last few decades.


ETA. After looking at the specific model you specified and its schematic drawing , you should be safe with the middle range of loads you listed for a starting point,as the design IS NOT the toggle action.

Henry can handle the middle one. I load for same lever gun...

Do yourself a favor and buy the lyman guide too. More cast data than Hornady.

I started by loading the mid group and found my head rattled a little more than I liked. I reduced the same 4198 powder into the Trapdoor range and range time is a heck of a lot more fun.

Plenty of energy in Trapdoor loads to do just about anything (including kill a few buffalo).

I also play with some Red Dot loads for even more pleasant plinkers.

If you dong cast, it is the perfect round to use as an excuse to start since bullets arent very cheap.

Good luck!

Do your self a favor if shootin lead slug your barrel .