Sharps 50-70 smokeless data?

[wstrayer]

My SR4759 is about gone. Looking at smokeless data for 50-70 I see several sources listing sometimes widely varying load data.
With the 450 cast bullet, I see AA2495 listed at 29.5 grains up to 52 grains. I tried the 29.5 grain load but it lodged the bullets in the bore.
Clearly not enough powder ignition. The IMR4198 load of 30 grains did actually fire all 5 cartridges, but accuracy was terrible, and I suspect that it too had ignition variations.
So for those who have a Sharps carbine, what is you secret to getting a good smokeless load?
I don't want to mess around with BP. The case cleaning is a pain and the groups were not that good.

[Jim]

Check this out . . . .

Scroll way down to find some smokeless loads for your 50-70

https://armscollectors.com/trapdoor/shooterstext.html

[Tony Beck]

Try 23 grains of AA 5744 with the Lyman 50-70 bullet (515141), or an equivalent bullet. That runs just under 1200 fps out of my M-1870 Trapdoor and no signs of excess pressure. Quickload guesses just under 11K psi. and nails the velocity prediction. I have fired this load in Sharps 50-70 carbine conversions with no problem, but don't have chrono data.

NOTE: This forum does not endorse the safety or suitability for any loading recommendations posted by users. Use at your own risk, and remember that individual loading practices and skills may vary and what one user reports as safe may not be safe when attempted by another person and used in a different firearm.

[wstrayer]

I was considering using a wad over the powder, then corn meal, and then seating the bullet onto the corn meal.
I remember reading about using corn meal vs Dacron puffs as a powder holder.
If it wasn't for the required cleaning of cases right after shooting, I would go to BP.

[gew98]

My SR4759 is about gone. Looking at smokeless data for 50-70 I see several sources listing sometimes widely varying load data.
With the 450 cast bullet, I see AA2495 listed at 29.5 grains up to 52 grains. I tried the 29.5 grain load but it lodged the bullets in the bore.
Clearly not enough powder ignition. The IMR4198 load of 30 grains did actually fire all 5 cartridges, but accuracy was terrible, and I suspect that it too had ignition variations.
So for those who have a Sharps carbine, what is you secret to getting a good smokeless load?
I don't want to mess around with BP. The case cleaning is a pain and the groups were not that good.

I use trail boss to the base of the seated bullet. Works quite fine - zero corrosive issues.