Why "uncomfortable"?
Are you concerned about deeper seating depth increasing pressure?
You understand that we must first determine Max/Working OAL using the plunk test/function test BEFORE we conduct powder work up?
If we are talking about "plunk test", as long as round drops into chamber freely and turn without hitting the rifling, we are good. Based on your posts, Canik Mete looks to have leade length between M&P Shield and Tactical Kinetics barrels and should be workable unless forward part of chamber is really tight to rub with case neck bulge as
@243winxb posted -
https://www.thehighroad.org/index.p...grain-projectiles.910788/page-2#post-12423914
If you are concerned about pressure increase, adjust your powder charge. If my working OAL/bullet seating depth is deeper than published, I consider adjusting my start/max charges by .2-.3 gr.
Since your posts mentioned HS-6, let's use that powder for calculations referencing Hodgdon's load data for 124 gr Lead CN -
https://hodgdonreloading.com/rldc/
NOTE - Look and compare the bullet base of Cone Nose to SWC bullet base. Yes, SWC bullet base is longer.
- 9mm 125 gr Lead CN HS-6 COL 1.125" Start 5.9 gr (1,023 fps) - Max 6.6 gr (1,124 fps)
Let's say your working COL/OAL comes out to be 1.069" or even shorter 1.045", I would reduce my "initial" start charge for powder work up down to 5.6 gr. Heck, if you are really concerned using shorter 1.045" OAL, reduce it further like 5.0 gr until slide barely cycles and then work up from there.
Then once I have reliable slide cycling and spent case extraction/ejection, I would incrementally increase powder charge by 0.1 gr and work up towards "adjusted" max charge of 6.0-6.3 gr while looking for accuracy trends. But my experience with HS-6 has been accuracy is optimized towards near max/max load data.
But of course, it's your fingers on the line, not mine so do whatever makes you less "uncomfortable".