Tikka .243 build off action

You can do pretty much anything on a Tikka provided it wasn't something like a 6mm STW. Any 3.340" or under cartridge would work. On a regular .472 bolt face you could even do a fast twist .240 Weatherby Mag which would be sweet as anything, already has a long throat as Weatherby cartridges do for the long bois (just need to be diligent around load development). All you would need is a "long action" magazine and bolt stop.

That said, 6mm Creedmoor is the easy button if you want to shoot factory ammo with heavy-for-caliber bullets. That one would be a straight rebarrel. If you already reload, the new 1:8-twist .243 T3X rifles look like a sweet option. A few others have settled on 1:8 for the .243, Remington being one of them. Hope this catches on.
 
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