I do know it does occur, but I do not know of any official sanction to do so, how the troops got that ammo there would be a Hardy Boys grade mystery...
While I don't own a one of these pistols, I have observed that running IVI 9mm will hard recoil, batter the slide, and incur stoppages in a civilian Sig P226, whereas the same gun with American Eagle 9mm runs flawless. It lends credit to my idea that our Inglis Browning's are not inherently unreliable, just that IVI ammo may be a little warm for the recoil springs to manage. Jim, I do recall speaking with a friend of yours, D.Haines that he remarked 9mm ammunition used to come labelled differently for SMG vs Pistol Only, nowadays we only get one type, regardless of application. I do wonder if there was some powder loading difference between the rounds, and if the SMG spec stuff became the mainstay of the pistols.
If I had some IVI 9mm issue ammo and a chrony I could put that theory to actual test.Information
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