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AR15.COM
6/20/2026 9:14:33 PM EDT
My 642 Smith & Wesson Airweight will take a .357 Magnum in the cylinder, even though it's marked .38 Special.

I'm still new to Revolverland, but I thought the cylinders were shorter on .38 Special to prevent that? My Ruger LCR marked .357+P cylinder is actually a slight bit shorter than the 642 cylinder.

What am I missing?
6/20/2026 9:43:35 PM EDT
[#1]
Not supposed to.
BikerNut:
Normal people like motorcycles. Real people like motorcycles.

People who don't like motorcycles are just... weird.
6/20/2026 10:19:02 PM EDT
[#2]
I figured it out....
And I feel stupid.

The box of.357 ammo I had in my fort from the Sandy Hook panic had several rounds of .38 swapped in to replace the .357. Some neckbearder pulled a fast one at Cabela's or Bass pro. When I was looking at this, I didn't actually read the case, just pulled some from the box marked .357 and started dropping them in.

I had both guns on the table and realized the cylinders were similar length, when I always thought the .38 would be visibly shorter and that the round would stick out of the cylinder to prevent interchange. I seem to remember seeing that before.

The Smith has a change in the inside diameter that keeps the .357 from seating or the cylinder closing.
6/21/2026 10:10:23 AM EDT
[#3]
I once had a Charter Arms Bulldog that would chamber .44 Magnum rounds.  Definitely not a combination one would want to fire.  Another bad combination is the old Colt .38 Long revolvers as they will chamber and fire .357 Magnum at least once.

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