R.B. CARBINE.

[JWvanIperen]

You are right, the original charge is indeed 45 grains. That is indeed the load I used to figure out how far the bullet would be in the cartridge: 50-70 brass shortened to 1.35"

JW

[ndnchf]

Ok. I look forward to seeing what bullet you end up with and your results

[JWvanIperen]

Just read a nice article: Remington's Model 1867 Navy Carbine from "The Gun Report" Nov 2005 that mentions a 385 grain bullet over a 45 grain charge.

As for the bullet: hat will take a couple of weeks before the mold is available. will keep ypu posted!

JW

[ndnchf]

I have a notebook that I record the bore, groove and twist rate of my guns in. I went to add my measured navy carbine twist with a note about yours. I had forgotten that previously I had recorded the twist of my Remington .56-50 split breech carbine. The split breech is the predecessor of the navy carbine. The split breech twist is 1:30. The .56-50 and .50-45 are quite similar except the former is rimfire. The latter is just a little longer. Its not surprising that they have the same twist.

[JWvanIperen]

According to the same article in The Gun Report from Nov 2005 the sample carbine provided to the Bureau of Ordnance was based on Remington's standard .50 Spencer rimfire model. This one was not accepted and the advise was to keep the grooving, twist etc but increase the barrel length 4", the sight to have a graduation for 200 yards and swivels for sling bands to be attached to all arms.
I have no idea whtat the rifling of such a Spencer carbine was.. Anyone on this forum??
I will stick to my plan to get a mold for a 430-450 grain bullet that should give a stabilized bullet with this barrel configuration. It is always possible to make the mold shorter.

[ndnchf]

If their report referred to "Remington's standard .50 Spencer rimfire model", then that would be the split breech carbine. Here are mine together. Note that my navy carbine is a put together version with an original navy barrel.