https://www.nzhuntingandshooting.co.nz/f53/tikka-t3-magazine-mod-27848/
Type: Posts; User: veitnamcam
https://www.nzhuntingandshooting.co.nz/f53/tikka-t3-magazine-mod-27848/
The existing 223 mag can be modded to take longer.
Haven't done it myself but a bit of a google should bring up something.