Swed Rolling Block

[Scotty]

Going to be entering the crazy world of 12.7x44R in a few days.

[leadman]

Nice looking Rolling block. I have a Swede in 8X58R Danish Krag cartridge. Dutchman on here is a wealth of information on these old guns. He may have answers to any questions you may have.

[Gunsmoke4570]

I too have one in 8x58R and have yet to shoot it. It is one of the cartridges I'm looking to be casting for soon.

[enfield]

I suppose you will be trying to talk me out of some brass and boolits now

[Scotty]

I suppose you will be trying to talk me out of some brass and boolits now

I have 348 win brass and a mold on order

[enfield]

I just cast some .515 450 gr. yesterday and can fire up the coal powered lathe to de neck those 348 cases in a jiffy !

[Scotty]

I just cast some .515 450 gr. yesterday and can fire up the coal powered lathe to de neck those 348 cases in a jiffy !

Just cut the neck off,anneal and fire form?

I wonder how the LEE .515" 500gr. would work?

I also ordered the LEE sizer .501" and .510" so I can try rolling a few boolits in paper.

[elk hunter]

Scotty,

You will probably need to do a chamber cast to see what diameter bullet you can use. My 12.7 Swede will only let me use a bullet of .508 and that only leaves about .001 clearance for neck expansion, it measures .515 groove to groove IIRC. I've heard many of the 12.7's were made into 50-70's by the gentle application of a reamer thus making them more user friendly in this part of the world. Not something I would do, but apparently many others think otherwise.

Good luck with your new project.

[Dutchman]

Just cut the neck off,anneal and fire form?

I wonder how the LEE .515" 500gr. would work?

I also ordered the LEE sizer .501" and .510" so I can try rolling a few boolits in paper.

I would try and dissuade you from such a heavy bullet. The original was 345 grains. I shoot 350 and 450 but the 12,7x44R isn't a big case. I can compress 75 grains of Ffg and seat a 350 grain. It's just not a big powerhouse cartridge.

I loaded some Lyman Great Plains muzzle loading bullets in the 12,7xr44R and they worked ok with blackpowder. You can measure bore & groove at the muzzle with dial calipers. Chamber length can vary somewhat and chamber diameter can be tricky as we're taking the late 1860s and into the 1870s. If you have trouble chambering a loaded cartridge consider trimming the length until it does chamber. You can also do a conservative chamber polishing with a split dowel and electric drill using 320 grit crocus cloth and some WD40.

Sometime by summer 2011 I'll have a webpage devoted to doing a complete disassembly, inspection and "prudent" spruce up on my Gustaf 1875 sporter. I'm lacking a rear sight $$$.

You're going to outgrow those sights real fast .

My "do not exceed" loads are for prudence. Once I achieved blackpowder equivalency that's where I stopped at the time. The rifle can take a bit more 5744 but I saw no need to go further at the time. If you can't kill Bambi or Smokey or Wiley with 1300 fps and a 350 grain bullet you need to take up golf.

This is from previous outtings:

12,7x44R Swedish rolling block
30" barrel sporter

Chronographed with 1867 Remington sporter
using Doudna 450 grain FN bullets .512".
All are excellent loads.
Blackpowder loads uses vegetable wad card
on top of powder (Buffalo Arms).
Cases - reformed .348 Winchester
Standard primer for Unique & XMP5744
Magnum primer for blackpowder

12.5 grs. Unique = 1074 FPS average
very accurate load

24 grs. XMP5744 = 1089 FPS average
26 grs. XMP5744 = 1151 FPS average
27 grs. XMP5744 = 1211 FPS average Do not exceed
70 grs. FFg = 1214 FPS average

350gr FN (Doudna) .512"
29 grs XMP5744 = 1337 fps average Do not exceed
44.44 extreme spread
18.02 std deviation
This is a very accurate load in my 1867 sporter.

[Scotty]

Awesome, thanks Dutchman!!!

[Scotty]

The sporter had a real bad pit ahead of the chamber, so its going back and being replaced with a 1874 M67 full military. Wish me luck with the bore on this one.

[Scotty]

http://www.youtube.com/watch?v=zUFSOHXtSWM

[leadman]

Looks like you had fun with that light load. Did it fireform the brass?

[Frank46]

Scotty, always liked your demonstrations. Especially with the husky bolt actioned rifles and now the rolling block. Keep them coming. Frank

[Scotty]

Looks like you had fun with that light load. Did it fireform the brass?

Not very much no. lol

[Scotty]

Scotty, always liked your demonstrations. Especially with the husky bolt actioned rifles and now the rolling block. Keep them coming. Frank

Thank you very much.

[ambergrifleman]

I have a Full Military12.7x44. I Love to shoot it, I use the Lee .515 450 Grain Bullet, Sized to .512. I have used Trail Boss Powder and 2400 Powder in it. I used published Springfield Trapdoor Loads for my source of Information. Enjoy those Old Fine Firearms.