I send my barrels to Ecco machine in Elizabeth, Co for threading. Nick, the owner can cut, thread, and then mount a threaded collar to the barrel to provide a nice wide shoulder for the can to lock against. According to him the minimum barrel barrel diameters for each thread pattern with this method are .510" for 1/2-28, .573" for 9/16-24 and .635" for 5/8-24.

I don't have any Tikkas on hand, but I measured one of my last copies and I think you'd be able to do your Tikka lite in 5/8x24 at most any length.

On the topic of length, shorter is better for a suppressed rifle, 16" - 20", the velocity you give up is well worth the shorter length with a can installed. If you really need more velocity, I'd go with a bigger cartridge over a longer barrel, cans knock down blast a huge amount and recoil quite a bit, so the main cost is the extra powder.

I have a .30-06 X-Bolt chopped to 18.5" and threaded 5/8x24, and a 6.5 CM Kimber Montana chopped to 20" (probably could have gone shorter) and threaded 1/2x28 as my main hunting rifles:

The X-Bolt while out hunting yesterday (the elk were not cooperative).

[Linked Image from i.ibb.co]

Another virtue for suppressed hunting rifles is lightweight, Kimbers are great for this, my copy comes in at 7lb 1.1oz with scope and can.

[Linked Image from i.ibb.co]

This is what the muzzles with collars look like

[Linked Image from i.ibb.co]

Bonus pic of a Ruger 77/44 I had done the same way in 5/8x24.

[Linked Image from i.ibb.co]

Last edited by Gtscotty; 10/27/19.