Question: Since birdshot is not available in 10mm...

Alpine

Can 40 cal birdshot be used in a 10mm pistol?

Also can 40 cal ammo be used in the 10mm without damage?

Inquiring minds want to know.

MIKE WISKEY

"Also can 40 cal ammo be used in the 10mm without damage?"'''''''''''''''short answer No, grossly inadiquate headspace. it may work but....

BobJudy

MIKE WISKEY is correct, they both headspace on the case mouth and the 40 is way too short. If it did fire it would also carbon up your chamber and cause problems switching back to 10mm unless the chamber is scrubbed out. Bob

Rocky Raab

The 40 Short and Weak MIGHT go off, if it was held firmly in place by the extractor claw. But the guys are correct about it being a bad idea.

savage170

Unless you have a revolver chambered in 10mm then no problem

mike55

Just use bird shot in a 10ga, works WAY better! 😁😎

elubsme

Make your own, it is easy. Card wad, shot, card

wad and a little glue.

Rocky Raab

Yup. Use a SMALL powder charge (try about 3.0 Bullseye) very small shot (#11 if you can find it) and use hot glue to hold the top wad in place. Do not crimp, as that will mess up your headspace.

I used to make up 1 3/4" .410 shells to fit in an Italian .45 Colt revolver (My Ruger's cylinder was bored too tight to accept them) and they were great. In the Ruger itself, I made up .45 Colt shells as described above. You should have seen the look on my buddy's face once when I casually swung and wiped out a starling flying by. I had not told him I had a shot load up first.

Edit: forgot to say...take a trashed case, bevel the mouth and use it to cut wads from heavy card stock. If you drill out the primer hole, that makes it easy to push the cut wads out.

Alpine

Thank you for all your answers. Maybe CCI will come through with a birdshot round, they are, I believe, an Idaho company.

drobs

40sw in a 10mm, it shouldn't work but it does. I've shot a bunch of 40sw out my 10mm XDM and it works just fine.

Toolman286

We had an "astute" patrolman almost qualify using .380's in his 9mm (x19.) He just had too many fail to fire. But, but, the box said 9mm (kurz).

bambihunter

https://forums.gunbroker.com/discussion/comment/11371547#Comment_11371547

Just because it does, doesn't mean it's a good idea.

Alpine, is the 10mm in question one that can have a .40 S&W barrel bought/made for it? 1911's aren't generally terribly expensive to have one made. I've got .40 S&W, .357 SIG, and 9x25 Dillon barrels for a couple of my Glocks. I mainly did this so I can use/load cheap 40 brass in places I can't recovery my more expensive 10mm brass. Otherwise, I have no use for that round.

Honestly, I've not really found pistol-caliber shotshells to be of much use or even guns like the Taurus Judge that shoot regular .410 shotshells through a short rifled barrel.

Alpine

I have found 40 S&W shotshells locally. I will test them in the 10mm and have several friends that have used the 40 shotshells successfully in the 10mm. They don't cycle but I have never needed more than one shot to dispatch a rattler.