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redcat wrote:Marks?

Redcat

1869 and serial number - 3**

That's about it!

Mauserbill wrote:Hello
From the picture and the serial number font. I would stake my money on it being a
Swedish Carbine M/1864-1868 in 12.17x44. You say that yours is 45/70 are you positive.
I have attached a picture of an original for you to compare but they look the same to me.
If Original cal its classed as an obsolete cal and can be held off ticket sec58

Thanks for that, I'll slug the barrel

Hello
Typically the bores on these rifles are all over the place so slugging would be a good start for either caliber.
Have you tried a 45/70 case in the breech.
The 12.17x44 was a rimmed case, have you looked at the firing pin arrangement.
Have a look at the youtube shows your rifle being fired https://www.youtube.com/watch?v=i9jgglXhxSc

Best of luck
Bill

The Swedish rolling block in 12.17mm is very close dimensionally to the US 50-70 round which preceded the 45-70. The Danish version is very nearly 45-70. I used to shoot one of these using 45-70 brass which had been annealed and fireformed. I neck sized only and reloaded using an old set of 455 Webly dies. Very accurate rifle but difficult to hold because of the excessive drop on the stock--- no cheek rest.
The rolling block is a very strong action, but somewhat elastic and so heavy loads will result in the rim of the case being thrown out of allignment slightly.
Back in the early '80s, Fultons had a rolling block action in their window which had been blown up. The hammer and rolling block system had not failed---- the join of the barrel and action had given way.
Fred

I slugged the barrel and confirmed it is a 12,17 and not a 45/70
I ordered some 50/70 brass and 50/70 dies as the first step to getting the reloading process underway.