What bullet weights or you using? Here is one for 154gn heads.
Viht n560:- 65.7gns maximum, with Winchester magnum primer should give you 3000fps out of a 24” barrel.
Start your loads at 55gn and work up watching for signs of high pressure, from what I have read most magnums give best accuracy towards there maximum powder fill.
Do not exceed the above.
Thar