Loads for 300 Remington Ultra Mag?

I have a remington sendero in 300 RUM, with a brake.

I use Reloder 25 with Fed 215 M primers as a start.

One load (you need to figure out the charge) shoots 168 TSX at 3450 fps and 165 BST (not sure on velocity) under 1 MOA.

However, I finally settled on 180 accubond at 3350 fps well under 1/2 MOA. Superb !
 
Congrats on the purchase. I have the same gun (including LH) but without the brake. The most accurate load for me so far has been 96.6 grs of Retumbo pushing a 180 gr Barnes TSX with Federal primers. Shoots just over an inch at 100 yards with my gun.
 
US 869(just like H870) from Hodgdon meters well in a powder measure and works well in that caliber as does Retumbo. Tried 190 Sierra matchkings for precision and 200 Sierra SBT for moose hunting. Got about a 4" group doing snaps @ 500 with the 190's in a 700P. Honest moa with the sbt.

Andy
 
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