22 rimfire unburnt powder
- Thread starter dully1963
- Start date
Slugging the bore and checking the velocities will not do anything.
I think if you check the powder you think is un burn You will find it has been . Larry
And, exactly which "laws of physics" are those????
Water doesn't run up hill .
That can be the reason our gun club hasn't been able to get to the 1000 yd backstop . The lowest spot is at the back stop .
Larry
That can be the reason our gun club hasn't been able to get to the 1000 yd backstop . The lowest spot is at the back stop .
Larry
It is obvious that you don't have a clue about physics... or unburnt powder.
I'm helping people by answering the smith questions they have , NOT picking apart answers to others post without giving any helpful info .
I'm not here to teach YOU ! You my friend have a LOT to learn on who to call names . Keep shooting chucks and I'll keep replacing barrels for those who appreciate quality work .
Gary
I'm not here to teach YOU ! You my friend have a LOT to learn on who to call names . Keep shooting chucks and I'll keep replacing barrels for those who appreciate quality work .
Gary
I disagree, if the bore was, for a lack of better term, "loose" the gas could be escaping around the bullet and causing the pressure to drop. A proper bullet to rifling fit will ensure proper pressure spike and in return assure the powder is burning correctly. If you don't agree with this, pour some powder on the ground and light it....then put that same amount into a well sealed container and light it. The powder in the sealed container will burn better than the powder in the open air space.
I agree with this
To be that "loose" it would have to be a different caliber. Rimfire bullets are over size to fit a rimfire bore (.222" diameter). To be large enough to bleed gas, the barrel would have to be a different calibre... and just how does tha happen.
The reality of it is, many rimfire cartridges leave unburnt powder in the bore and action. They can't all have oversized bores.
At the end of each of my smallbore league matches we sweep the spent cases up into a pile on the concrete floor. 20+ shooters firing 60+ rounds in three hours adds up....
There's always a considerable amount (1/4 - 1/3 cup or more) of what looks like unburned powder underneath the pile of cases, that we're careful to dispose of properly.
Maybe next time (league starts week after next!!) I'll take it out to the gravel parking lot, see just how much is really unburned.
My guess is that most of that stuff in the barrel is not unburnt powder some of it might be but I image most of it is left over residual burnt powder kinda like ash from a wood fire. I'm not saying the entire bore is oversized, but portions of it could be....just as well as it could also be undersized. I do know that slugging a barrel will greatly increase accuracy if done before chambering and cutting the crown. I believe there was a very lengthy article and study published about this topic in Precision Shooting Magazine. Slugging the bore will find these tight and loose spots. And yes maybe a bullet is oversized and gets squeezed down to a particular diameter, but if that happens to happen within the first inch of the barrel and the next 2 inches are slightly larger in bore size, gas will escape past the bullet. All this wouldn't be a problem if the bullet could expand to fit those oversized areas, but a bullet just will not do that.Not all barrels and bores are completely uniform the entire length of he barrel. As matter of fact I really doubt there is a single barrel with an exact bore diameter the entire length of the barrel.
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change your ammo. with the shortage of 22 ammo we got some remingtons for our club! when we shot it we could hear that it made different sounds and then one member shooting his 10/22 found out one of the bullets was left in barrel and he had a swelled spot in his barrel out near the end. the rifle still shoots good but we no longer allow Remington 22 ammo on the range!
Andy - I'd be less concerned about residue in the barrel than I would the dreaded "black ring" inside the chamber, just beyond where the brass casing ends. The black ring is a combination of carbon, lead, and bullet lube which can be difficult to remove and start to affect accuracy after several hundred rounds, in my experience.
Some 22 lr ammo will appear to be more dirty than others. In my Anschutz Match 54, any Lapua manufactured ammo leaves a lot of visible residue in the bore. Conversely, any variation of Eley "appears" to burn much cleaner. The accuracy of either brand is excellent, however, regardless of burn characteristics. And the accuracy will hold over several hundred rounds, FWIW.
The Ruger 10/22 presents a challenge in inspecting and cleaning the breech end of the bore (unless you are willing to remove the barrel or have a Takedown model or have an access port bored into the rear of your receiver). So, if you can find somebody with a bore scope that can reach to the chamber from the muzzle end, it might show you what's really going on with different brands of ammo.
Just my .02.
Mike
Some 22 lr ammo will appear to be more dirty than others. In my Anschutz Match 54, any Lapua manufactured ammo leaves a lot of visible residue in the bore. Conversely, any variation of Eley "appears" to burn much cleaner. The accuracy of either brand is excellent, however, regardless of burn characteristics. And the accuracy will hold over several hundred rounds, FWIW.
The Ruger 10/22 presents a challenge in inspecting and cleaning the breech end of the bore (unless you are willing to remove the barrel or have a Takedown model or have an access port bored into the rear of your receiver). So, if you can find somebody with a bore scope that can reach to the chamber from the muzzle end, it might show you what's really going on with different brands of ammo.
Just my .02.
Mike
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