I have a question: what are the chances of using 22 LR in a 22 magn. chamber?

It won't work.

The .22 mag chamber is larger diameter at the base than a 22 LR. If it does in fact fire, it will split the case.

Drifter

It won't work.

The .22 mag chamber is larger diameter at the base than a 22 LR. If it does in fact fire, it will split the case.

Drifter
So once you rechamber a gun in that sense, there is no way back. And what is the difference in thousands of an inch from .22 LR to .22 MAGN?

The .22LR case uses a heeled bullet...the bullet is the same diameter as the case, just a rebated heel is crimped inside the case. The .22mag. uses an inside the case bullet seating.

Difference is (about) .224" case diameter for the .22LR and .241" for the .22mag...is enough to consider it a one-way conversion.

Is a difference in barrel diameter as well...most .22LR's are designed arround a (again...more or less) .222" bore while the .22mag. runs .224"...that .002" is that great a difference.

The .22LR case uses a heeled bullet...the bullet is the same diameter as the case, just a rebated heel is crimped inside the case. The .22mag. uses an inside the case bullet seating.

Difference is (about) .224" case diameter for the .22LR and .241" for the .22mag...is enough to consider it a one-way conversion.

Is a difference in barrel diameter as well...most .22LR's are designed arround a (again...more or less) .222" bore while the .22mag. runs .224"...that .002" is that great a difference.
I understand. So, besides a one-way in the chamber, the bore puts additional resistance to the bullet on its way out, along with a higher pressure on the chamber. Making it a potential dangerous gun.
I guess factory-made firearms, (such as the Ruger .22 LR-MGN revolver) have that 0.002" tolerance in the bore construction. As cylinders are chambered differently.
So, the learning is: Not a good idea to rechamber that single shot old AGAWAM. Right?

I understand. So, besides a one-way in the chamber, the bore puts additional resistance to the bullet on its way out, along with a higher pressure on the chamber. Making it a potential dangerous gun.
I guess factory-made firearms, (such as the Ruger .22 LR-MGN revolver) have that 0.002" tolerance in the bore construction. As cylinders are chambered differently.
So, the learning is: Not a good idea to rechamber that single shot old AGAWAM. Right?

I've asked a few questions, and measured other convertible revolvers. Most seem to use the .224" barrel and just rely on the soft .22LR bullet to slug up the .002"....some use a .222-223" barrel as a compromise.


Have measured some .22LR barrels that were a tight .219"...one of those porably shouldn't be asked to tak a .224" jacketed bullet.

Usually not a good idea to convert a .22LR to .22mag. unless it happens to be on a strong action...and even then, would take careful measurments of the bore. Some .22LR's have a firing pin strike that would end up not at the right spot of the larger .22mag. rim...would fire it MOST of the time, but unless the strike if fully accross the rim it's hard to be 100% reliable.

I've asked a few questions, and measured other convertible revolvers. Most seem to use the .224" barrel and just rely on the soft .22LR bullet to slug up the .002"....some use a .222-223" barrel as a compromise.


Have measured some .22LR barrels that were a tight .219"...one of those porably shouldn't be asked to tak a .224" jacketed bullet.

Usually not a good idea to convert a .22LR to .22mag. unless it happens to be on a strong action...and even then, would take careful measurments of the bore. Some .22LR's have a firing pin strike that would end up not at the right spot of the larger .22mag. rim...would fire it MOST of the time, but unless the strike if fully accross the rim it's hard to be 100% reliable.
Then, I got your point. Better keep that old Agawam as it is for "rabbit purposes"......hehehe