Lyman has a book specificlly for cast bullets.
LYman Cast Bullet Handbook 3rd. edition.
I have used alot of loads in their. The closest one to match your request is 121 gr.
I would use that and stay just a hair under maximum.
Unique 4.3 - 5.3 gr.
DISCLAIMER: Author assumes no responcibility for anything from now untill the end of time for anything suggested or implied or imagined or whatever.
Check your own loading data, nra handbook, boyscout manual, or state and federal laws.
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