Chunk Gun

Fox

Fox

CGN Ultra frequent flyer
Rating - 100%
49   0   0
Location
Kemptville
Well, I was finally able to get some pictures.

The hammer was not staying back, so I pulled off the lock and sure enough, the sear spring is broken. I will have to get the lock to the gunsmith when I can, I do not have the spring clamps, but not right now.

Here you are, I put it all together and set it on my dining room table just for you guys.

20240205_194735_resized.jpg
20240205_194738_resized.jpg
20240205_194741_resized.jpg
20240205_194745_resized.jpg
20240205_194748_resized.jpg
20240205_194752_resized.jpg
 

Attachments

  • 20240205_194735_resized.jpg
    20240205_194735_resized.jpg
    59.3 KB · Views: 232
  • 20240205_194738_resized.jpg
    20240205_194738_resized.jpg
    72.4 KB · Views: 230
  • 20240205_194741_resized.jpg
    20240205_194741_resized.jpg
    69.3 KB · Views: 228
  • 20240205_194745_resized.jpg
    20240205_194745_resized.jpg
    59.2 KB · Views: 228
  • 20240205_194748_resized.jpg
    20240205_194748_resized.jpg
    63.9 KB · Views: 227
  • 20240205_194752_resized.jpg
    20240205_194752_resized.jpg
    62.8 KB · Views: 229
Do you have the false muzzle?
Have you measured the rifling twist?

I did a search for NMLRA chunk gun rules. Your rifle would not be eligible for the Friendship chunk gun matches. It is a heavy target rifle, not a chunk gun. Whether it is intended to shoot round balls or bullets, will depend on the rifling twist.
 
Last edited:
tiriaq said:
Do you have the false muzzle?
Have you measured the rifling twist?
Click to expand...

There is a false muzzle but it is rifled.

The twist is not marked on the barrel, it is a GR Douglas barrel.

I have not measured the twist, I really should have when I dragged it up for pictures but since the lock is broken I did not worry too much at the moment.

It honestly seems like it may be a slug gun. The rifling is 8 groove and shallower than I have seen with the PRB guns that I have. When I got the conical twist 45 cal Kentucky rifle I noticed that the rifling was significantly shallower than the patched round ball Traditions Kentucky rifle that I have.
 
A false muzzle is often rifled. If it is, the rifling in the bore and false muzzle should absolutely coincide. Generally speaking, a bullet shooting gun will have more shallow grooves than a round ball rifle. Just use a tight fitting patch on a rod with tape flags so that you can see the rod turn.
 
tiriaq said:
A false muzzle is often rifled. If it is, the rifling in the bore and false muzzle should absolutely coincide. Generally speaking, a bullet shooting gun will have more shallow grooves than a round ball rifle. Just use a tight fitting patch on a rod with tape flags so that you can see the rod turn.
Click to expand...

Ya, I have not been able to check the twist yet, that will clarify for me for sure.

The false muzzle has locating pins so that way it is consistent.
 
The pins are probably located so that the false muzzle can only be installed one way. This is so the rifling will align. Is there a piston starter that fits onto the false muzzle?
 
tiriaq said:
The pins are probably located so that the false muzzle can only be installed one way. This is so the rifling will align. Is there a piston starter that fits onto the false muzzle?
Click to expand...

That is exactly it, they are round nose locating pins like I would design in to locating for machined parts, exactly the same, they are not evenly spaced, so they key to the rifling in the muzzle.

No piston starter than I have found, many soft mallets though.
 
If it is a slug gun it might use grease grooved bullets or paper patched ones. Some slug guns used 2 piece bullets with a softer base and harder nose. If there aren't molds or swages accompanying the rifle it is hard to say. A fifty caliber slug gun would be using a pretty heavy bullet. The rifling twist will tell if it is a slug gun or ball gun.
 
Chunk Gun?

Fox said:
Well, I was finally able to get some pictures.

The hammer was not staying back, so I pulled off the lock and sure enough, the sear spring is broken. I will have to get the lock to the gunsmith when I can, I do not have the spring clamps, but not right now.

Here you are, I put it all together and set it on my dining room table just for you guys.

View attachment 744547
View attachment 744548
View attachment 744549
View attachment 744550
View attachment 744551
View attachment 744552
Click to expand...

It is almost certainly a slug gun, given what you have told us. As for replacing the broken sear spring, that is an easy fix for anyone who can make a flat spring. If you have to buy one, look for a maker's name on the lock plate and order a replacement from Dixie Gun Works or Track of the Wolf (TOTW) for a few $$. If no name is obvious, take measurements off the broken one and a photo then send the info to TOTW: they will undoubtedly have a spring that will fit.
 
Ol' Flinter said:
It is almost certainly a slug gun, given what you have told us. As for replacing the broken sear spring, that is an easy fix for anyone who can make a flat spring. If you have to buy one, look for a maker's name on the lock plate and order a replacement from Dixie Gun Works or Track of the Wolf (TOTW) for a few $$. If no name is obvious, take measurements off the broken one and a photo then send the info to TOTW: they will undoubtedly have a spring that will fit.
Click to expand...

Unlimited Bench AMS or OS lite bench has a 14lbs weight limited they shot both at Friendship and OMLA at trails end round ball only 50 and 100 yards.
 
Ya, as I thought.

I pulled up my work 3D CAD and made a 42in long octagonal barrel with a 0.5 in hole, the weight of the barrel itself comes in at 19.5lbs.
 
Fox, what you have in your pictures appears to be a slug gun not a chunk gun. Chunk guns may not have false muzzles and use open iron sights. slug guns use false muzzles and have an unlimited use of scopes and or sights.
 
MC One Shot said:
Fox, what you have in your pictures appears to be a slug gun not a chunk gun. Chunk guns may not have false muzzles and use open iron sights. slug guns use false muzzles and have an unlimited use of scopes and or sights.
Click to expand...

I contacted the guys in Friendship, they are going to help me out with exactly what I have.

Worst case this is a really heavy piece or art, ha ha.
 
Loading a muzzleloading rifle can cause wear to the crown. A false muzzle is a detachable extension of the barrel and bore. The patched ball or bullet is started in the false muzzle then seated into the actual bore with a piston type plunger which aligns with the bore. The projectile is then seated onto the charge, usually with a greased wad or lube cookie separating the powder and projectile. The false muzzle not only holds the projectile in alignment, it can also initiate the engraving process. It may be sized internally to ease entry of the projectile. Wear to the crown is minimized and the projectile is started in perfect alignment with the bore. This is particularly important with an elongated bullet.
Usually a false muzzle will have a blocker which appears in the sights, to reduce the chance of the rifle being fired with the device in place.
The false muzzle will be fitted with pins which engage the barrel. The starter will fit on the false muzzle.
Often when a false muzzle is desired, holes are drilled and reamed, then a piece is cut off and the faces turned flat. The piece is then reinstalled and final reaming and rifling is performed, so that the rifling in the muzzle is exactly in sync with that in the bore.
 
You must log in or register to reply here.
Back
Top Bottom