8208, 168 eldm 16.5” barrel 8 twist questions re max charge etc

Hi all, I’m reloading 308 using 8208 and 168 eldm I was at range today and ran up a load on my new rifle starting at 40 and ended up at 43 gns 42 and 42.5 were best groups then it opened up but at 43 started to close again so I want to go to 43.3 but wanted to ask if anyone can run it through quick load re pressure, rifle is a 16.5” 8 twist. Average speed at 42 was 2565 average at 43 was 2620, ran some super performance 165 sst as well and got 2700 average. Any info would be appreciated.

I used to use 43gns 8208 with 168gn Makers, was a getting warm. Never tried std projectiles.
Now using different powder as 8208 got too hard to get for a while

16 inch Tikka T3x, 2650fps on the Garmin.