Identifying muzzle loader breach types

Muzzleloading Forum

Help Support Muzzleloading Forum:

Audie1966

32 Cal
Joined
Jan 30, 2021
Messages
24
Reaction score
10
I have several Front Stuffers and have put my Bore Scope down each when I clean them. I am trying to determine exactly what type of breach each Manufacturer uses as each brand looks different. I want to run a "Scraper" down in to clean the breach but do not want to damage the internals. My Thompson Centres have a peculiar design. Patent or standard? What types are these? Thompson Centre. Investarms (Lyman). Traditions.
 
Joined
Oct 10, 2009
Messages
314
Reaction score
185
Location
Modesto, CA
Your T/C and most imported guns have a Patent Breech. Similar to the CVA breech shown below. I've seen people make curved scrapers for these but don't recall the dimensions. You really can't hurt the breech with a brass scraper.
1658829549646.png
 
Joined
Jul 6, 2021
Messages
325
Reaction score
385
Location
Hilton Head, SC
Here are 3 different breeches, a Hatfield (patent breech), a Green Mountain 40 cal ( notice cone shape), smooth bore with an English breech. I use brass brushes of different sizes to clean them. I’m not sure why breech scrapers were designed as they are, because having viewed breech design with a bore scope, they aren’t effective to clean the area in its entirety. There seems to be a breakdown between design for combustion and ease of cleaning. Without a doubt, the patent breech is the worst to clean.
 

Attachments

  • 257C389A-45D6-404C-A8E3-B8C1B81DBF91.jpeg
    257C389A-45D6-404C-A8E3-B8C1B81DBF91.jpeg
    56.7 KB · Views: 0
  • C03028FB-4074-47A5-8E78-70976FD2BBC9.jpeg
    C03028FB-4074-47A5-8E78-70976FD2BBC9.jpeg
    50.5 KB · Views: 0
  • 032DCF89-6D4F-4827-B96E-A5012C0E3037.jpeg
    032DCF89-6D4F-4827-B96E-A5012C0E3037.jpeg
    49.2 KB · Views: 0
Joined
Oct 9, 2004
Messages
9,775
Reaction score
8,737
Location
St. Louis, MO
The standard breech scrapers are designed for the traditional breeches and are not so useful for the various chambered or patent breeches. The use of a subcaliber brush is best for the chambered breeches. The chambered breeches are designed for ease of manufacturing a breeched rifle barrel.

Let's take a look at @Flint62Smoothie's post on chambered breeches.

In this post here, discussing Patent Breeches, the late (and sorely missed ...) Zonie opined this posit:😢

"The chambered breech is easy to make which explains why almost all of the Italian made muzzleloading rifles on the market use it."

Link =
View attachment 133936

Henry Nock was granted a patent in April, 1757, for his clever "false breech", which improved ignition and increased velocity in flint guns. Similar to a modern Diesel "pre-ignition chamber", later percussion breeches were modeled after his design.

View attachment 133937
As we can see, the Nock's Patent breech is far more complex than the usual Italian chambered breech.

Thanks to @Dude, we have this picture of the Thompson Center breech plug.
1658886740224.png


And you can see the complication of getting from the snail to the powder chamber that is different from most chambered breeches. The T/C breech falls into the chambered breech/patent breech description.
 
Joined
Aug 14, 2022
Messages
1,132
Reaction score
2,706
Location
idaho
 
Joined
Aug 14, 2022
Messages
1,132
Reaction score
2,706
Location
idaho
T/C Breech 54 cal

tcbreech.JPG
CVA Breech 54 cal NOTE THEY ARE NOT THE SAME despite previous advice

cva54.JPG

Traditions 50 cal

50 cal Traditions.JPG
 
Last edited:

Latest posts

Top