Why do people put a round in the barrel of a Mosin?
- Thread starter Crooton
- Start date
- Location
- Western Manitoba
I have seen by gun buyers often - not just on Mosin's either - the idea, I think, is to satisfy that there is still some rifling left at the muzzle - has not been worn away by sloppy cleaning rod or pull through "cleaning". Some claim to be able to verify bore size that way?? 270 versus 30-06, for example. Not sure about .277 barrel versus .284 barrel, for example, since the technique would be registering on tops of the rifling (bore size), not into the the grooves (bullet diameter)...
Wormald1995
CGN Regular
- Location
- near toronto
To show it's not counter bored
In addition to demonstrating it's not counterbored...
A bullet will sit high in a tight bore. One that's worn and corroded will allow the bullet to rest on the muzzle much deeper almost to the brass. Since factory ammunition is spec'd to a specific size it means accuracy will diminish somewhat as the rifling wears out. Often cleaning will more difficult as the bore wears as well due to the deposits in the pitting.
Reloaders can sometimes regain accuracy of a worn barrel by using larger bullets to match a worn barrel.
A bullet will sit high in a tight bore. One that's worn and corroded will allow the bullet to rest on the muzzle much deeper almost to the brass. Since factory ammunition is spec'd to a specific size it means accuracy will diminish somewhat as the rifling wears out. Often cleaning will more difficult as the bore wears as well due to the deposits in the pitting.
Reloaders can sometimes regain accuracy of a worn barrel by using larger bullets to match a worn barrel.
WereWeasel
CGN Regular
- Location
- Albert County, N.B
I think you found your answer throw another variable in for you: Some believe and I have no idea if it’s true if a muzzle is burned out ie the bullet is loose in the muzzle and there is little to no visible rifling then the throat is therefore believed to be burned out and that means the barrel is shot out.
That’s why you’ll see ads that read “bore is frosty but still passes bullet test” or “bore is shiny and tight” then shows bullet test.
That’s why you’ll see ads that read “bore is frosty but still passes bullet test” or “bore is shiny and tight” then shows bullet test.
diabeticfreak
CGN frequent flyer
- Location
- The fields of Ontario
Just like what everyone is saying, it is to show the wear and tear on the rifling.
It's what a lot of folks do. The fly in the ointment is the curve of the ogive, especially with the VLD and ELD bullets available. Milsurp ammo will give a better idea.
The Wizard
CGN Regular
- Location
- Colorado Springs, Colorado USA
They are measuring "muzzle erosion"!
highlander
CGN Ultra frequent flyer
- Location
- Newfoundland
It wasn't; everyone knew what you meant, that was just an ignorant comment on his part.
Yep!^^
Don't let that kind of thing stop you from asking questions, Crooton.
Many of us enjoy being able to answer such questions and we also learn from other points of view.
A MILSURP bullet will give a better indication. Even a worn muzzle can shoot reasonably well assuming that there are no puckers, gouges and irregularities in the crown. the idea is for the bullet to have a clean and predictable exit from the muzzle. I've had M1903 and Garand barrels shoot acceptably well, even though they gauged .303 versus .300 at the muzzle.
