338 powders for 300 win mag

[Twdmar]

I'm looking for any info about powders made for big cases like 338 lap, RUM etc. In a 300 winchester magnum.
I can find some powders like ramshot lrp and imr 8133. There is not data for them in 300 win mag(which is what I am loading). The usual 300 win mag powders are not available.
There is some 300prc data but I have not compared it enough with the 300 win mag. I would think starting loads for prc might be a good starting place for the win mag.

 

[Murray Brook]

Take Aim at Rifle Reloading Data | Hodgdon Reloading
Some good info here in the Hodgdon data center

 

[Twdmar]

Take Aim at Rifle Reloading Data | Hodgdon Reloading
Some good info here in the Hodgdon data center

Data is good, the problem is getting powder.

 

[Murray Brook]

It has some data on the IMR8133 with 200 gr bullets and the Enduron line of powders which should be easier to get.

 

[El Matador]

Nosler has data for 8133 in the 300 WM with a 200 grain bullet. 73.5 grains to start (2679 fps) and a max of 77.5 (2815 fps). As murray brook noted the Hodgdon site also has data for 8133 and 5 different bullets ranging from 200-230 grains. The only other powders I've used in a big 338 are H1000 and RL33. H1000 is hard to find and RL33 is gonna be too slow and bulky for a 300 WM unless you're shooting 230-245 grain bullets.

 

[Alaska Bush Man]

I shoot both the 300 WM and 338 WM
Reloader 19 is excellent in both with 180gr in 300 and 225gr in 338 WM
IMR 4350 is another good powder with both bullets mentioned .
If I had one powder IMR 4350 !

 

[Wildcats]

In the 338 Lapua i normaly stay wth VHT 570 and Rel. 26
300 wm i've always had excellent results with H1000,VHT-170 and Rel-25. with bullets from 185 scenars to 210 bergers also had good results with the 208 amaxs when they were aval. so take your pick.out of a 1-10 twist krieger or Hart barrel