.243w 70gr LBT cast load info?

[sawinredneck]

I've searched and read, looked through all manuals, even the Lyman cast 11th edition! But I'm finding nothing for a 70grn cast, much less the LBT mold!
This is for my sons single shot Rossi, so not a high volume shooter. I have Varget, Popper is trying to talk me into 4895 (for my LR-308 loads), Unique, AA #7 andAA #5, on hand.
These will be PC'd and I don't have to cycle an action. I've read these rifles like the lighter bullets, why I got the mold, so anyone have suggestions?

[earlmck]

I'm not familiar with that bullet but my 80 grain gc boolet does well with 10 grains of Unique, and without the gas check I have done nicely with 8 grains of the Unique.

[JWFilips]

11 Grains Reloader 7 works for me

[popper]

I used H4895 for the G.K.s 243 with 90gr jacketed, worked fine there too. Down loaded to youth loads for them but in 6 mo. they were shooting factory ammo. Varget was pretty much unobtanium back then.

[JonB_in_Glencoe]

There are 3 loads for 80gr in castpics (link at bottom of the page), lists MAX load, just reduce by 10% and work you way up.
using powders:
2400
Unique
IMR 4227


My personal pet load for the NOE 245-75gr with a alloy that's about 16BHN.
Mil surp powder Alcan 9450, which Jeff at GIbrass says is very similar to SR4759, which is the data where I started.
15gr gave me about 1900fps and the best accuracy.
from Lyman manual data, I calculate about 21K PSI

[sawinredneck]

Thank you all, I'll update after we do some shooting.