Are these all 22 Mag?

[jmelcock]

Wondering if someone can tell me if all of these are 22mag cylinders.Confusion! thanks for any input. jmelcock

 

[Busterswoodshop]

Stick a .22 mag cartridge in it and if it fits then it is a .22 mag cylinder.

 

[9x19]

.22 Magnum cases are larger in diameter than .22 LR, so just slip a LR round into one of the chambers, if it's a sloppy fit, they are either .22 Magnum or .17HMR (the holes in the front will answer that).

 

[GasGuzzler]

Need better pics than that. Let's see the chamber bores and the profiles. The latch end looks like NMSS .22LR or OMSS .22WMR. Need to know if they're fluted or not and if they have steps in the chambers.

My gut is the middle one is a NMSS .22WMR cylinder and the bottom one is an
OMSS .22WMR cylinder.

 

[Richbaker]

Chamber bores on the Mag cylinder will have a step down towards the bullet end. This is because the bullet is not heeled and requires the chamber to have a throat. IE: Case diameter is larger than the bullet. LR has a heeled bullet that is the same OD as the case, therefore there is NO "step". The chamber is bored straight thru.

 

[jmelcock]

Thanks for the pointers. They are all OM Mag cylinders. Now...What is the proper way to measure them?
This is how I got my #. Is this correct?

 

[rugerguy]

you got it, it is the "overall length".....and will be slightly different from different "era" of cylinders, and make sure the 'edge' of the tips of your calipers do not measure within the 'ratchet' cuts, slide the cylinder more into and on the "flats" of the calipers.......ensure a more "positive" reading..........if there is ANY 'bevel (slant) to the stub (gas seal) end, you can get a different reading and also "see" if its NOT "square"......nice pictures by the way, just a bit MORE light, behind or into the chambers, so you can "see" the 'step'....put them next to a 22 caliber cylinder and if your eyes are "good" you can SEE the difference in the chamber diameters.......