Loads for an original Navy rolling block converted to 45-70

[sunshinegirl]

I picked up a rifle with a Navy rolling block action. It's with a gunsmith, but I believe it was manufactured in the 1880's. The fellow I got it from used it for long range shooting, and it was converted by his dad with a new 30" barrel, and beautiful wood. One thing I forgot to ask was loads for it, and I am unsure what pressures it will handle. I find lots of stuff for the Italian rolling block, but nothing for an original action. I would appreciate any help. Thanks Rachel

[Frank46]

Keep your loads within trapdoor levels. At or around 25,000 psi. Your shoulder will give out before the roller will. But stay away from any rompin stompin loads. Frank

[streak]

Rachel,
If you would get in touch with Croft Barker at Cistern Publishing Co., he can probably enlightned you on your original rolling block rifle.
Just do a search for Cistern publishing Co.

[Nobade]

The twist rate, bore/groove dimensions, and throating will tell you what bullet to use. Propellant  is your choice of various brands and grades of black powder. Beyond that it's all load workup and playing with variables like lube and primers, compression, wads, etc. to find the best load. The question of strength and "what will it take" is not relevant if you load it properly with the correct propellant.

[sunshinegirl]

Thanks guys. I have in at the smithy's for a little tighting up, and as soo as we get rain here in the AZ rim area, I'll try it out. Thanks again

[Flynmoose]

I find that a 405gr LaserCast bullet ahead of some TrailBoss fun to shoot. I have only shot out to 500 yards so far, about the limit of my eyesight. I am happy with the accuracy and low recoil of a TB load.
FM

[rsl]

I found an old trapdoor load that works great with low recoil.. 300 gr. lead bullet, 35grains of 3031..
Another fun load with same 300gr bullet is a case full of Pioneer Powder [black powder replacement] fill the case so the bullet will compress the powder a little. Doesn't have to be exact. Seat the bullet..   Good Luck[/color]

[Steve E]

A good low level smokeless charge is 27 gr. of 5744 with a 400 gr to 500 gr bullet. My rolling block really shines with a home cast 500 gr.  ww bullet and the 27 gr load of 5744.

Steve E............