we can go on and on a this or we can just share info,like the 100 or so members I share with every year
Here are my best loads so far. They probably won't work in your rifle because my DTA SRS has a really long mag which allows me to load right out to the lands. Adjust COL as required and don't expect what works in my barrel to work in yours. Might get you in the ballpark though. Also while these are safe in my rifle I can not guarantee they will be in yours.
Disclaimer out of the way here you go.
Hornady Brass
CCI 250 Large Rifle Magnum primers
All groups are 5 shot.
92gr Retumbo with 300gr Berger Hybrid and COL of 3.87" gave 3/4" group at 200yds
84gr RL-22 with 300gr SMK and COL of 3.79" gave 3/4" group at 200yds
84gr RL-22 with 285gr Hornady Match and COL of 3.8" gave 1.5" group at 200yds
99gr US869 with 300 SMK COL of 3.79" gave group of 1" at 200yds
103gr US869 with 300gr SMK COL of 3.79" gave group of 1" at 200yds
I do my ladders with 5 rounds loaded 0.5gr increase for each set
I have some more with Retumbo and Berger 300gr Hybrid OTM Tactical waiting for testing and will share results after I have a chance to get out to the range again.
These are all still in development but are my best loads so far.
Good luck and don't cry to me if they give you poor results, they were developed to work in my rifle.