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6mm TCU

The 6mm TCU was developed by Wes Ugalde of Fallon, Nevada for Thompson/Center as one of the chamberings for the Contender single shot pistol. It is the 223 Remington necked up to to 243 caliber and is practically identical to the older (1965) 6mm 223 Remington or the 6x45mm. The 6mm TCU is intended primarily as a metallic silhouette pistol cartridge, whereas the 6mm 223 Remington was developed as a rifle cartridge for benchrest and varmint shooting. The 6mm TCU is adequate for small to medium varmints, but is on the light side for deer. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

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There is no printed reloading manual created for this caliber. There will be created a Wire-O booklet of all calibers with at least 60 loads present.
Click here to see in which calibers this reloading manual is available.


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With a subscription you can download all loads in 6mm TCU as a PDF load manual. On top of that you will also get unlimited access to downloadable PDF manuals in several hudred calibers.


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reloadersnest Complete Reloading Manual
The Complete Reloading Manual is a compilation based on all rifle calibers with at least one load from this site.
The book contains 311 calibers and 9557 loads. 549 pages in 8x5 inch Perfect-Bound binding.
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60 grs
Sierra Hollow Point
68 grs
Berger Hollow Point Match
70 grs
80 grs
Reminton Power Lokt HP
58 grs
Acuurate 2200
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