Thankfully, it won't fit.moonlight said:I am very unfamiliar with 9x21 and am not sure if it will fit my Hellcat.
No, .38 Super is NOT 9x23. The case length is the same for both, at .900" -.010. However, the .38 Super is a constant diameter (cylindrical) case of .384" diameter, whereas 9x23 is a tapered case, tapering from .3911" just forward of the extractor groove down to .381 at the case mouth.rc said:while not recommended it "may" work in a 38 super which is 9x23 ...
No, .38 Super is NOT 9x23. The case length is the same for both, at .900" -.010. However, the .38 Super is a constant diameter (cylindrical) case of .384" diameter, whereas 9x23 is a tapered case, tapering from .3911" just forward of the extractor groove down to .381 at the case mouth.
9x23 may chamber in a very sloppy .38 Super chamber -- but it shouldn't.
In other words, it will fit ... unless it doesn't.74A95 said:What's important is the 38 Super chamber dimensions, not the 38 Super cartridge dimensions.
The 38 Super chamber ahead of the breach face is .3887 + .004. Thus it can be as large as .3927, which will easily fit a 9X23 cartridge.
9X23 ammo fits in most of my 38 Super barrels, except one where it won't (Clark). 9X23 fits in my Kart 38 Super barrels, and they are hardly sloppy.
In other words, it will fit ... unless it doesn't.
Physical dimensions aside, the 9x23 is a 55,000 psi cartridge, and .38 Super is 36,500 psi. It's really not a good idea to shoot 9x23 through a .38 Super pistol, but everyone gets to make their own decisions.
However, we're getting off-topic. The question was shooting 9x23 in a "9mm" (which I assume means 9x19/9mm Luger/9mm Parabellum) pistol, and the answer to that is still "No." My comment was to refute the statement that 9x23 is the same as .38 Super. Whether or not it may fit some .38 Super chambers, it definitely is not the same cartridge.
Let's get back to the question asked in the opening post.
But the OP (Moonlight) asked about shooting 9x21 in a 9mm (9x19) Springfield Hellcat. That simply can't work at all, so please stop muddying the issue.rc said:While the 9x21 rounds will likely have malfunctions in a longer 38 super chamber just like 9x19 it can work in a pinch through some 38 supers, it is one possible way to dispose of that box of ammo.
But the OP (Moonlight) asked about shooting 9x21 in a 9mm (9x19) Springfield Hellcat. That simply can't work at all, so please stop muddying the issue.