Counterboring A Barrel To Save Its Length?

[Bruce Cobb 1723V]

Has anybody done this instead of crowning and lopping off the end of a worn barrel? If so, how big a diameter was it over the size of the bore? How deep? I'm sure I am not the only one who has thought of it. Thanks

[Maillemaker]

My first thought that comes to mind is that as the bullet clears the rifled portion of the barrel and enters the counterbored area the charge gasses will escape around the bullet, possibly altering its flight characteristics.

Steve

[johnefelts]

I believe Steve is correct.

[mb3]

I dont know how well a counter bored BP rifle would work. If counter boring is the same as a re crown then I have owned and shot a couple of modern rifles that were counter bored. They shot just fine- re crowned.

[matt]

Steve,
If what you are saying is true than none of the TC rifles with the QLA system should shoot worth a darn. The question is when the barrel is counterbored is the boring done straight? If it is then you have basically recrowned the barrel internally cause the lands should all be even at their end, the small amount of barrel that was counter bored should have no effect as when the bullet leaves the rifling it is flying as true as it is ever going to get. A damaged crown lets more gas escape from one side then the other. This is not the case is a properly counter bore barrel.
matt

[Maillemaker]

I have never heard of the TC QLA system until now. I just did some googling on it and I am not entirely sure what it is they are doing.

Steve

[Rich Foster]

Bill Large did this to some of his new barrels. Mine is .54 Miss. 8 land 8 groove 1/2" in depth taper inside muzzle outside of lands to make it load easier and it shoots second to none like all his barrels. Of course Bill large did things to his barrels that others said could not be done and he did it and made it work. He was one of the best barrel makers. Now that saying that counter boring is possible but whoever does it better be good at it. Because if it is not true you will get flyers. Rich Foster DSR TW4765

[MR. GADGET]

Not our type but I own several military guns that were done that way, if done correct, should shoot fine.
Also own a TC Encore 50 cal, they have always CB their barrels about 5/8 - 3/4" for ease of loading hunting loads. No real need for a starter. Makes it fast, easy and it shoot fine.

[Southron Sr.]

At one time I had an original M1861 Rifle-Musket that had been counterbored-IT SHOT FINE

[rachbobo]

The 1819 Hall Rifle is a rifled breechloading flintlock. The first few inches of the muzzle was counter bored.
This was done to make muzzle loading easier if the "tip up "action froze up from rapid fire.

Bill Cheek
Cockade Rifles