Powder suggestion for lighter .45-70 trapdoor loads?

[hc18flyer]

I am looking to shoot the Lee 340 grain rnfp in the 1100-1200fps range. I have several rifle and pistol powders, including IMR 4759 and Accurate 5477 to choose from. I have seen a reference to using Alliant Unique, foggy on the details? Our rifle is a Browning Hi-wall. Mostly plan to shoot with iron sights out to 100 yards. THANKS in advance for your replies, hc18flyer

[RickinTN]

12 grains of Unique should work very well for you. It does with a 365 grain gas-checked bullet for me. Very comfortable to shoot. the SR4759 should also be a good powder for you but it will take more powder to get the same velocity. I'm not a big fan of 5744 although many are. I think you will have to push your bullet faster than you want to get good results with the 5744.
Good Luck to you!
Rick

[Texas by God]

A friend's Marlin Cowboy 45-70 and my P14 .450 Marlin both liked the Lee 340 over Unique several years back. I'll see if I took notes.

Sent from my SM-A716U using Tapatalk

[hc18flyer]

'RickinTN'- I did find an earlier thread from Larry G. that said 5744 wasn't a good choice for lighter bullets, at lower velocities. I have Unique to try. Thanks, hc18flyer

[Ron in PA]

I use 12 gr of Umique with the Lee 340gr and Lyman 457124.

[RickinTN]

'RickinTN'- I did find an earlier thread from Larry G. that said 5744 wasn't a good choice for lighter bullets, at lower velocities. I have Unique to try. Thanks, hc18flyer

Good Deal!
I might should have mentioned that 10 grains of Red Dot works pretty well also, and, although I haven't chronographed it, I think will give about the same velocities.
Good Luck,
Rick

[hc18flyer]

Good Deal!
I might should have mentioned that 10 grains of Red Dot works pretty well also, and, although I haven't chronographed it, I think will give about the same velocities.
Good Luck,
Rick

Rick, I don't have any RD, I do have some older(trapshooting days) Green Dot, might be a good way to use it up? I will look at the 'burn rate' charts? Thanks, Tom

[Happyguy]

In like 11 grains of Trail Boss and a 405 cast plain base bullet.

[hc18flyer]

In like 11 grains of Trail Boss and a 405 cast plain base bullet.

I do have a little Trail Boss, will give it a try. Thanks, hc18flyer

[gc45]

having shot thousands of loads using 10 and 11 grains of Unique you will like it!

[Noah Zark]

Another vote for 12 gr of Unique. Have used that load for 35+ years in the 45-70.

Noah

[ABJ]

I use 4759 under a 300 FP in a scoped Buffalo Classic. I'm at work and don't have my load notes but I did use trapdoor section and 1200 fps as my target. That load will cut bullet holes at 100 yds. Also I did use Dacron as per Gibson's instructions. That was the first load I tried and have stuck with it. Just for giggles I tried some 5744, and it did pretty good, around 1-1/2 at 100 but the point of impact compared to the 4759 was 2 inches away. Either one is a doable hunting load. Also tried 4198, and 3031 and didn't like either one of those. Based on using Unique on other cartridges I'm sure it would work, but I haven't used it.
I will say this on 5744 vs 4759. 5744 I have found it will work in place of 4759 but it requires a little more load development work. I have enough 4759 to last so it's my first choice for hunting rounds (less than 50 rounds per year).
Tony

[hc18flyer]

Thanks ABJ! I was lucky enough to find an old(full)can of 4759 at a Gun Show a few years ago, and I will likely save that for hunting loads. Last night I cast up a bunch of Lee 340 grainers. Tonight I will size and lube some in the RCBS LamII, as well as 'BLL', to load as cast?