[Ron LeClear]

Big Bore Fans,
I am loading the Lee 310 gr gas-check in my 444 Marlin and want to try some WW 748 powder. None of the books I have show any loads and I have checked the internet sights I know of and came up empty there.
Do any of you folks have a starting load for this combanation??? I know that many ball powers have a (do not load less than) warning and I like being safe rather than sorry.

Thanks

Ron

 

[southern utah]

444

I have 2 magazine articles that show cast loads.

310 RCBS cast SWC- RL-7 45.0 grs. 2,017 fps
IMR-4189 43.0 grs. 2,041 fps



John Taffin article

SSK 310 gr.FP H4895 51.3 grs. 1,906 fps

 

[KN]

I wouldn't think that 748 would be a good powder for the 444. H322 works great for me. KN

 

[The Happy Kaboomer]

I use 40 grs. of H4198 behind a cast gaschecked Lee 310. Avgs. 1904 fps out of my marlin .444p over my oehler cronograph. Not max but plenty of oomp for whitetails.
Don't believe 748 to be a good powder for the .444.