measurements of common .22 ammo and some observations

[rodent.22]

  (1.) Remington bulk solidpoint unplated- .9750 OAL, bullet diameter .2250, shell diameter .2250  (2.) CCI Minimag 40 grain solidpoint copperplated- .9890 OAL, bullet diameter .2230, shell diameter .2240 (3.) Winchester 333 bulk 36 grain copperplated hollowpoint- .9630 OAL, bullet diameter .2220, shell diameter .2240  (4.) Winchester Xpert 36 grain unplated hollowpoint- .9630 OAL, bullet diameter .2200, shell diameter .2250 (5.) Federal Automatch 325 round 40 grain solid- .9750 OAL, bullet diameter .2240, shell diameter .2240 (6.) Federal Bulkpak 550 36 grain copper platedhollowpoint- .9770 OAL, bullet diameter .2230, shell diameter .2240 (7.) American Eagle 40 grainsolid point unplated- .9790 OAL, bullet diameter .2235, shell diameter .2240. As you can see, the Remington bullet and shell diameters are larger than all the other rounds, except for the Winchester Xpert shell diameter, which is the same as the Remington. In a tight chamber the combination of a larger diameter bullet and a larger diameter shell casing would cause failure to seat in the chamber, failure to eject and light strike problems (caused by the firing pin driving the shell forward in the chamber causing a light imprint in the rim.) The Winchester Xpert ammo also has a larger diameter shell, but the brass doesn't seem to ''grab'' the chamber walls unless combined with the larger diameter bullet, like the Remington ammo. If you are having problems with your .22, you very possibly have a ''tight chamber'' and you need to change to a smaller .22 round. Overall length can vary, the diameter is what is causing people problems....

[Microgunner]

Interesting info. Thanks.

[a|ex]

reason why some 25 round mags are also advertised as 26 round mags...

-a|ex