Buckshot
09-22-2005, 02:39 AM
http://www.fototime.com/0DFEC9AA1352E89/standard.jpg
This is the little carbine. The barrel is 22" long. It has a bayonet lug bar on the right side of the barrel. The cartridge for this was called 11x42 or 11x43R Comblain. It isn't very long but is large in diameter ahead of the rim with a rapid stright taper to a short abrupt shoulder to creat a short neck for holding the bullet.
The cases were of the brass foil construction similar to the British foil 577-450 ammunition. The rifles and carbines were invented and built by Emil Nagant, of Russian M91 rifle and pistol fame. The action is a falling block, similar to a Sharps.
http://www.fototime.com/AC591CEC925A2E1/standard.jpg
On the upper left part of the action are 2 lines of script reading:Emil Nagant, then Liege Belgium. On the barrel is a common carbine type sight of the era. A short bed with 3 steps for elevation and then the ladder lifts, and it has an elevator. The front sight is a bead on a block soldered to the barrel.
The object extending down into the operating lever-triggerguard contains the trigger (on the front with the little curve on the bottom). It also houses the trigger spring, sear, and sear spring. To open the action you hook your right thumb through the lever and push forward and down.
http://www.fototime.com/4A280AA9B475B9D/standard.jpg
The hammer resides inside this shroud. The shroud is all machined steel and is dovetailed to the rear of the breechblock and fully hides the hammer. This seems odd to me considering the fair chance of a bad primer needing a 2nd smack to go off. The hammer is cocked automaticly when the breechblock is dropped, so if it fails to fire you have to open the action to re-cock the hammer.
http://www.fototime.com/022CFD7381B30B6/standard.jpg
This is the action open. The hammer and shroud being attached to the breechblock naturally follow it down. At the bottom, the extractor is automaticly operated and extracts the fired cartridge. Very similar to the Martini.
The 3 screws you see in the bottom left are what retains the entire mechanism in the action. The large headed screw on top was added by Brazil as a 'keeper' screw for the one under it. This one when removed allows all but the extractor to fall out the bottom. It's the hingepin for the action lever. The rearward screw is the hinge for the extractoer and when removed, the extractor can be removed.
http://www.fototime.com/7A12618D703BEC8/standard.jpg
Here is the mechanism out of the action. You can see that everything is attached to the lever itself. The breechblock requires no linkage, such as the Sharps rifle. There is a very slight angle to the breechblock mortice in the action, which allows it to slide up and down.
All the machine work is typical of the era. In otherwords it is flawless. Unbelieveable work as a matter of fact, everything is so precisely fit together. A niceity is the firing pin. It is very easy to replace. It is retained in the breechblock by a screw. With it's removeal the firing pin is easily replaced if broken or removed for cleaning.
http://www.fototime.com/8F2D7613C6820E4/standard.jpg
Here are 4 targets I shot with the shotshell cases after I'd made my dies and stuff to do a better caseforming job on the parent 32ga brass shotshell cases. These were ones converted to use 209 primers. The range was 50 yards and all groups were 10 rounds except for the Blue Dot. I used 3 of those to get on paper.
While the SR4759 looks pretty darn good, the Unique and 2400 ones aren't real terrible if you consider a few things. The trigger is wonderfull by the way. Crisp with no creep, and rather light. One of the negatives is the rather rudimentary sights. The short distance between the front and rear sight. Add to that that this was the first outing with the new brass and these loads were just pulled out of my, ah ear.
Probably most telling was the grossly undersize bullet. I'd initially checked the barrel dimensions with a caliper at the muzzle and got a .433"x.452" reading. However, after doing a chamber cast I found it has progressive depth grooves. The bore remains the same at .433" but the grooves are .465" or about .016" deep at the chamber!! I was shooting the 292gr Lyman sized .459". There was NO leading BTW.
It has 4 lands and grooves of even twist (no gaintwist so far as I can tell ) and a righthand turn. Very odd to me is the speed of the twist as it is 1-16". Ususally back then with BP and a short comparatively light slug, the twist should have been stretched out some, you'd think? I have no info as to what the boolit actually wieghed, but for the photos-drawings it would appear to be about 300 grs or so.
I have the data but am too lazy to go get it :D IIRC the velocity was like 1100 fps or so.
The action must be fairly robust as Brazil later on did rebarrel these with Mauser barrels to 7x57 in the early 1890's, Their first Mausers (after a short test of the M1888 commission type) were the M1894 (modified 1893's). The action is elegantly designed and magnificently machined, and must have been a mutha to design I'd think. Reminds me of the old Zenith 'Works in a drawer" TV. Basicly you remove one screw and the works falls out the bottom.
................Buckshot
This is the little carbine. The barrel is 22" long. It has a bayonet lug bar on the right side of the barrel. The cartridge for this was called 11x42 or 11x43R Comblain. It isn't very long but is large in diameter ahead of the rim with a rapid stright taper to a short abrupt shoulder to creat a short neck for holding the bullet.
The cases were of the brass foil construction similar to the British foil 577-450 ammunition. The rifles and carbines were invented and built by Emil Nagant, of Russian M91 rifle and pistol fame. The action is a falling block, similar to a Sharps.
http://www.fototime.com/AC591CEC925A2E1/standard.jpg
On the upper left part of the action are 2 lines of script reading:Emil Nagant, then Liege Belgium. On the barrel is a common carbine type sight of the era. A short bed with 3 steps for elevation and then the ladder lifts, and it has an elevator. The front sight is a bead on a block soldered to the barrel.
The object extending down into the operating lever-triggerguard contains the trigger (on the front with the little curve on the bottom). It also houses the trigger spring, sear, and sear spring. To open the action you hook your right thumb through the lever and push forward and down.
http://www.fototime.com/4A280AA9B475B9D/standard.jpg
The hammer resides inside this shroud. The shroud is all machined steel and is dovetailed to the rear of the breechblock and fully hides the hammer. This seems odd to me considering the fair chance of a bad primer needing a 2nd smack to go off. The hammer is cocked automaticly when the breechblock is dropped, so if it fails to fire you have to open the action to re-cock the hammer.
http://www.fototime.com/022CFD7381B30B6/standard.jpg
This is the action open. The hammer and shroud being attached to the breechblock naturally follow it down. At the bottom, the extractor is automaticly operated and extracts the fired cartridge. Very similar to the Martini.
The 3 screws you see in the bottom left are what retains the entire mechanism in the action. The large headed screw on top was added by Brazil as a 'keeper' screw for the one under it. This one when removed allows all but the extractor to fall out the bottom. It's the hingepin for the action lever. The rearward screw is the hinge for the extractoer and when removed, the extractor can be removed.
http://www.fototime.com/7A12618D703BEC8/standard.jpg
Here is the mechanism out of the action. You can see that everything is attached to the lever itself. The breechblock requires no linkage, such as the Sharps rifle. There is a very slight angle to the breechblock mortice in the action, which allows it to slide up and down.
All the machine work is typical of the era. In otherwords it is flawless. Unbelieveable work as a matter of fact, everything is so precisely fit together. A niceity is the firing pin. It is very easy to replace. It is retained in the breechblock by a screw. With it's removeal the firing pin is easily replaced if broken or removed for cleaning.
http://www.fototime.com/8F2D7613C6820E4/standard.jpg
Here are 4 targets I shot with the shotshell cases after I'd made my dies and stuff to do a better caseforming job on the parent 32ga brass shotshell cases. These were ones converted to use 209 primers. The range was 50 yards and all groups were 10 rounds except for the Blue Dot. I used 3 of those to get on paper.
While the SR4759 looks pretty darn good, the Unique and 2400 ones aren't real terrible if you consider a few things. The trigger is wonderfull by the way. Crisp with no creep, and rather light. One of the negatives is the rather rudimentary sights. The short distance between the front and rear sight. Add to that that this was the first outing with the new brass and these loads were just pulled out of my, ah ear.
Probably most telling was the grossly undersize bullet. I'd initially checked the barrel dimensions with a caliper at the muzzle and got a .433"x.452" reading. However, after doing a chamber cast I found it has progressive depth grooves. The bore remains the same at .433" but the grooves are .465" or about .016" deep at the chamber!! I was shooting the 292gr Lyman sized .459". There was NO leading BTW.
It has 4 lands and grooves of even twist (no gaintwist so far as I can tell ) and a righthand turn. Very odd to me is the speed of the twist as it is 1-16". Ususally back then with BP and a short comparatively light slug, the twist should have been stretched out some, you'd think? I have no info as to what the boolit actually wieghed, but for the photos-drawings it would appear to be about 300 grs or so.
I have the data but am too lazy to go get it :D IIRC the velocity was like 1100 fps or so.
The action must be fairly robust as Brazil later on did rebarrel these with Mauser barrels to 7x57 in the early 1890's, Their first Mausers (after a short test of the M1888 commission type) were the M1894 (modified 1893's). The action is elegantly designed and magnificently machined, and must have been a mutha to design I'd think. Reminds me of the old Zenith 'Works in a drawer" TV. Basicly you remove one screw and the works falls out the bottom.
................Buckshot