My only testing with these 'home made bullets' was into a green railway tie at -40 degrees.

My .458 2" Mauser was driving these 480gr. bullets at just over 2,000fps impact speed.

The WW core bullet made 14 1/2" into the tie, and the pure lead core went 12 1/2". they made from 1" (hard core) to 1 1/2" (soft core) permanent cavities in the railway tie. That green tie was as hard as glass! Both bullets went through steel-like knots in the wood. I could barely dent the knots with the hammer end of the splitting axe.

I got the idea for these bullets from dear old John Buhmiller back in the 1970's. John was an African hunter, ctg. designer, gun maker and close friend & employer of Lester H. Hawkes both from Kalispell Montana - many decades ago. Les and Irene Hawkes later became a very close friends of both my wife after they moved near Smithers, B.C. 'Old John' called these ctg. case bullets, his "Mouse Hole Makers". Such memories come flooding back - thank you.

I would have absolutely no qualms about shooting game with these home made bullets.

I think one with the double ball bullets might give both excellent expansion and penetration, but for big game like Stags, I'd most likely set & crimp a 250gr. bullet into that .45 ACP case, instead and be assured of excellent penetration. along with expansion. A 50/50 WW/pure lead would be my choice for a core.