Happy New Year All!
45-70 Single Shot Government accuracy
- White Smoke
- Tenderfoot
- Posts: 8
- Joined: Wed Sep 17, 2025 3:20 pm
- Location: Encinitas, Kalifornication

Re: 45-70 Single Shot Government accuracy
Great range session! I was worried about the wind, but it was basically dead calm when we shot this morning. I re-sighted the scope at 50 yards and then moved out to 100. The ladder was from 52.0 grains of Vihtavouri N120 to 54.0 grains using a Hornady 250-grain MonoFlex bullet. I know, I know...54.0 is just over max, but my groupings dictated that I shoot it to see. There were no pressure signs and all went well. 53.0 grains grouped at 1.5" (4 rounds) and the 53.5 grains grouped at 1 5/16" at 2533 f/s. I am DONE! Just as an FYI, I talked with the techs at Henry about the accuracy expectations and some other stuff. That was absolutely the BEST customer service I have ever encountered. Those guys were amazingly helpful. Another FYI...My plinking loads are 44.0 grains of IMR 4198 with a Berry's 350 RS 45-70 bullet at 1788 f/s and my "Mouse Fart's" are 30 grains of IMR 4198 with the same Berry's bullet at 1200 f/s. The Mouse Farts still kick a bit, so I might drop them down to 25 grains in the future. Now to go out and try the hunting load on a coyote. I'm suspecting the innards will be like jelly!
Re: 45-70 Single Shot Government accuracy
I'm glad you got it sorted out! I've played with heavy .45/70 loads myself. In a Ruger #1 the 400 gr. Speers were popping out at over 1900 fps and out of a BFR 10" revolver they were over 1500 fps. Of course I was younger and more foolish back then......in my early 60's. 
Re: 45-70 Single Shot Government accuracy
5shot wrote: ↑Fri Jan 09, 2026 9:40 pmI'm glad you got it sorted out! I've played with heavy .45/70 loads myself. In a Ruger #1 the 400 gr. Speers were popping out at over 1900 fps and out of a BFR 10" revolver they were over 1500 fps. Of course I was younger and more foolish back then......in my early 60's.![]()
- White Smoke
- Tenderfoot
- Posts: 8
- Joined: Wed Sep 17, 2025 3:20 pm
- Location: Encinitas, Kalifornication

Re: 45-70 Single Shot Government accuracy
Now that all loads are confirmed and set, I switched all the scopes back around to where they should be. (I was using a higher power scope on the 45-70 during load development and sight in. Now that it is all done, I went back to a "short range" 3-9 for the 45-70 as its "regular" scope). I then had to sight in three rifles, so that is what I was doing this morning. I sighted the 45-70 in at 100 yards and got a 1 3/16" group using a Berry's 350 RS bullet and 44.0 grains of IMR 4198 powder.. Then, wondering what the drop would be at 150, I moved the target out. The drop was exactly 3" and the four-shot group size was 1 7/16".
Re: 45-70 Single Shot Government accuracy
Sighted in at 100 and only dropping 3" at 150 it sounds like you are hitting 100 on the upslope and coming back down through 150. Probably peaking a tad bit high at 105-110 yards.
Re: 45-70 Single Shot Government accuracy
White Smoke wrote: ↑Tue Jan 13, 2026 5:50 pmNow that all loads are confirmed and set, I switched all the scopes back around to where they should be. (I was using a higher power scope on the 45-70 during load development and sight in. Now that it is all done, I went back to a "short range" 3-9 for the 45-70 as its "regular" scope). I then had to sight in three rifles, so that is what I was doing this morning. I sighted the 45-70 in at 100 yards and got a 1 3/16" group using a Berry's 350 RS bullet and 44.0 grains of IMR 4198 powder.. Then, wondering what the drop would be at 150, I moved the target out. The drop was exactly 3" and the four-shot group size was 1 7/16".
love the moving scopes around, gives us a reason to get to the range and do some work. Right now I have all my loads developed and scopes sighted in. I need an excuse to go to the range once the weather warms up.
- White Smoke
- Tenderfoot
- Posts: 8
- Joined: Wed Sep 17, 2025 3:20 pm
- Location: Encinitas, Kalifornication

Re: 45-70 Single Shot Government accuracy
Slight correction on that last post. The drop at 150 was 3.5", not 3.0". Anyway, I have a new bullet on order...a Speer 400 grain SPFN. My hunting club is going on a campout in March and we will be setting some gongs out at 100 yards. The plinker load is pretty light and the 250 MonoFlex load is right about mid-range. I want to give the guys an example of a full-bore 45-70 to give them the "experience" of one, so I'll make up some loads with 54.5 grains of IMR 8208 XBR with the 400 bullet. That's a max load which should give them a very nice "experience"! That will give me three loads for the rifle, plus the Mouse Farts. When I get the 400's in, I'll run new drop tables for all three main loads. This should be fun!
Re: 45-70 Single Shot Government accuracy
Makes my rusty old joints cry out for an extra strength Tylenol just thinking about that load.
Kinda reminds me of a quote from an old cowboy...."When I squeezed the trigger the rifle plum backed right off that bullet".

Kinda reminds me of a quote from an old cowboy...."When I squeezed the trigger the rifle plum backed right off that bullet".