1/2-28 vs. 14-1 thread for Tikka .223

[C.T.]

So i've got a Tikka .223 on order (had to wait for 1-8 twist) and i'll be threading it for a silencer. I have a DPT 1/2-28 thread one I use to use on my AR so logically I should just get it threaded for that right, but I was wondering if there is any reason that would be a bad idea and I should thread it 14-1 as per the factory threaded Tikkas? the 1/2-28 leaves a 12.7mm OD thread vs. the 14mm OD thread. Could the smaller OD affect accuracy? My AR was pretty accurate but just wondering peoples thoughts mostly because i'm OCD and tend to overthink these things.