338 Lapua Improved fireform load request

ohnomrbillk

Well-Known Member
Joined
Oct 15, 2004
Messages
141
Location
NW Missouri
I'm putting an Ackley together. Looking for fireform loads.

I have Berger 300gr VLDs, Retumbo, and Lapua cases.

Any suggestions on powder charge?
 
Never had a 338 Improved, but MY rule of thumb is on any AI is FF using somewhere near max book using the parent cartridge.
 
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