Hodgdon only lists up to a 230grn bullet with the 300WM and H1000 but you could take that and work with it to find a 250 A Tip load. Hornady only lists the 300PRC and 250 on their site with a max load of 76grns and starting of 67.6. Obviously don;t use that data as it's for a different cartridge but just mentioned it to give an idea. It's tough to load for a combo with no loads listed. Have done it before.
ETA You could always try and give Hornady a call. They might have a starting point for you.
www.hodgdonreloading.com
ETA You could always try and give Hornady a call. They might have a starting point for you.
Take Aim at Rifle Reloading Data | Hodgdon Reloading
Find what you need in four easy steps. Select your cartridge type from the drop-down list. Then select your bullet weight, powder manufacturer and powder type. If you're unsure, or just want options, check as many boxes as you'd like. Click "Get Data" to view results.
