Talk:.22 TCM

22TCM9R - what exactly is it?

The 9R is so designed to fit into existing magazines? But it's also designed to fire down a .22-in. bore? Is the idea that a manufacturer who wants to design a .22 bored gun around an existing 9 mm magazine can choose this round? I know I am not writing clearly at the moment, but I just wanted to know why two new rounds have shown up, one right after the other. Fotoguzzi (talk) 19:31, 15 March 2015 (UTC)

The design utilizes the same concept behind the .357 SIG: basically, a very common case-width platform is used as a vehicle to fire a smaller bullet at much higher velocity than a full-caliber diameter heavier bullet, achieving carbine ballistics out of a handgun and rifle ballistics out of a carbine. The RIA pistol is sold with two barrels, and accommodates widely-available 9mm Para magazines. (Having one pistol fire several different calibers is especially attractive to buyers in jurisdictions such as the US where multiple firearms might require additional licenses and paperwork, and even more attractive when the different calibers do not require additional magazines.)--Froglich (talk) 06:10, 4 June 2016 (UTC)

22TCM "9R" is slightly shorter overall to fit inside popular Glock 9mm magazines. Same case, different slugs. This has been updated in the article, and References. The barrel and recoil spring can be changed between 9mm and 22TCM pistols.

Review: RIA .22 TCM Conversion Kits (2016) https://www.shootingtimes.com/editorial/review-ria-22-tcm-conversion-kits/99564 B Adventures (talk) 11:10, 24 April 2024 (UTC)

Finding that velocity hard to believe. Might be more useful to post typical performance out of the pistol. — Preceding unsigned comment added by 99.194.195.178 (talk) 18:05, 11 June 2016 (UTC)

All good points and addressed in the current April 2024 article updates. Can see the sources in the list of References section. B Adventures (talk) 10:52, 24 April 2024 (UTC)

I have addressed in the current April 2024 article updates. Can see the sources in the list of References section.

Paul Harrell comparison: 22TCM vs 5.7x28 vs 7.62x25 https://www.youtube.com/watch?v=vLCsQkEL9eQ

John Taffin published his reloading and velocity data twice: in 2017; and 2023.

Speed demon: reloading the potent little .22 TCM (2017).

https://www.thefreelibrary.com/Speed+demon%3A+reloading+the+potent+little+.22+TCM.-a0503466711

22TCM 1911 pistol and M22 bolt rifle review (2023). https://gunsmagazine.com/guns/handguns/a-pair-with-a-kicker/

B Adventures (talk) 11:05, 24 April 2024 (UTC)

Ballistic performance

Currently the info box shows 40 gr (3 g) Bullet weight, 2,800 ft/s (850 m/s) Velocity, 392 ft·lbf (531 J) Energy

Using my energy calculator, 40gr bullet at 2800 fps velocity gives 696 ft-lbs energy, not 392 ft/lbs. Working backwards, 40gr bullet with 392 ft-lbs energy would need about 2100 fps velocity. Could someone check this out? -- Naaman Brown (talk) 20:27, 14 July 2016 (UTC)

I have addressed in the current April 2024 article updates. Can see the sources in the list of References section.

Paul Harrell comparison: 22TCM vs 5.7x28 vs 7.62x25 https://www.youtube.com/watch?v=vLCsQkEL9eQ

John Taffin published his reloading and velocity data twice: in 2017; and 2023.

Speed demon: reloading the potent little .22 TCM (2017).

https://www.thefreelibrary.com/Speed+demon%3A+reloading+the+potent+little+.22+TCM.-a0503466711

22TCM 1911 pistol and M22 bolt rifle review (2023). https://gunsmagazine.com/guns/handguns/a-pair-with-a-kicker/ B Adventures (talk) 10:58, 24 April 2024 (UTC)

.22TCM or 22TCM?

The trade press and this article seems to prefer adding the period, whereas the company (and the main text of the article) go by "22TCM" -- so which is it?--Froglich (talk) 06:10, 4 June 2016 (UTC)

Whichever you prefer. The article has been updated with more practical and modern info. B Adventures (talk) 11:01, 24 April 2024 (UTC)