Ready for new breach plug

[Thunder14]

Ok here we go I cut off bad section of barrel 45cal. As was suggested.So the barrel is 15/16 from flat to flat my bore hole is .453/.454
Should I go with 9/16 x18 breach plug. The original drum was resessed this is the issues there was no barrel left and that caused the barrel to fracture. So if I could get direction with the installation of the new breach plug and drum I sure I can do this.

 

[SDSmlf]

Good move cutting the barrel back. Someone sure made a questionable situation when they gave that barrel flat a haircut.

Do you have a set of 9/16-18 taps, including a bottoming tap?

 

[Thunder14]

Have to pickup a bottoming tap,I'm figuring going in 1 inch,I'll run a 33/64 drill 1inch in then I'll run my 9/16 tap (bottoming) then measure for drum

 

[Grenadier1758]

Your breech plug will be safe enough if it is 1/2" deep. The drum should be threaded to be ahead of the end of the breech plug. You don't really need to have the drum threaded into the breech plug as CVA/Traditions install their breech plugs.

Get one of the gun building books for descriptions of how to install a breech plug. Alexander's "Gunsmith of Greenville County" is well illustrated and provide good description.

 

[Thunder14]

Thank you, I will try to find that book Gunsmith of Greenville County.

 

[Zonie]

Ok here we go I cut off bad section of barrel 45cal. As was suggested.So the barrel is 15/16 from flat to flat my bore hole is .453/.454
Should I go with 9/16 x18 breach plug. The original drum was resessed this is the issues there was no barrel left and that caused the barrel to fracture. So if I could get direction with the installation of the new breach plug and drum I sure I can do this.

The minor diameter of a 9/16-18 UNF thread is .502-.515. Since this is larger than the .454 diameter and twice the possibly .015 depth of the rifling (.454 + .015 + .015 = 484 diameter) the 9.46-18 UNF thread should work fine.

 

[Thunder14]

Thank you,I’m just wanting to get this correct so if i take my time and ask questions i should do just fine. I was questioning if i should us 5/8 or 9/16 breech plug but from my research it appears 9/16 is the way to go.im not sure what length the thread section is going to be on the new breech plug so we will have to wait and see,I’m being told i should not have to go into the barrel more than 1/2 inch.

 

[Grenadier1758]

Lets take a look at breeches.

Thanks to @Zonie for publishing these drawings

@Thunder14, your breech is a modification of the CVA breech. You did the right thing by cutting off that breech. The breech you want to install is the side drum.

 

[Thunder14]

Yes it definitely was the correct thing to do,now I’m wondering when it comes time to install the drum is it going to be an issue getting the hammer to line up since we will be moving everything forward or will we be ok because the new breech plug wont be as long.I was studying the different breech styles and the side drum was the one I was told to go with They said plug doesn’t have to go much more than a 1/2 inch in instead of the 5/8 the previous one was in.

 

[SDSmlf]

Real simple. Hole for drum isn’t located or drilled until everything else is done. Half inch thread depth on the plug is where to start, but the face of the plug has to be behind the hole for the drum. Need to be sure everything lines up before removing any metal.

 

[Phil Coffins]

A chambered breech will allow you to maintain the same over all length of the barrel.

 

[SDSmlf]

A chambered breech will allow you to maintain the same over all length of the barrel.

Believe barrel has already been shortened.

 

[Thunder14]

Yes the barrel was 32in now down to 28 1/2 . I am hopefully I can use the drum I removed I know that’s slim chances of it lining back up.So I’m just going to order a new drum.

 

[SDSmlf]

Yes the barrel was 32in now down to 28 1/2 . I am hopefully I can use the drum I removed I know that’s slim chances of it lining back up.So I’m just going to order a new drum.

Old drum won’t work, even if nipple hole rotates around, that nipple hole will be too far away from the barrel to be under the hammer. Remember the material removed from the barrel flat to move the nipple closer? Suggest a drum with no predrilled hole for the nipple. There are ‘kits’ to help line up, drill and tap the nipple hole. TOW has everything you need.

 

[Thunder14]

Thank you,yep I’ve been on TOW checking out the drum alignment kit.just deciding on what type of breech plug i need then we will be set.

 

[tallpine]

I highly recommend the drum alignment tool. If you don't use the tool be sure to order a few extra drums, you'll need them.