William, the best .450 Bushmaster will likely be a Soft Point for deer Sir. budsgunshop.com/product_info.php/products_id/718006576/federal+non+typical+450+bushmaster+300gr+sp+20bx ------------------------------- budsgunshop.com/product_info.php/products_id/718006575/federal+power+shok+450+bushmaster+300gr+sp+20bx

Depends on the kind of range your shooting at, but to be honest I don't think there really is a bad 450 bushmaster round, but in general youd be good to go with Federal power shock
https://botach.com/federal-power-shok-450-bushmaster-300gr-jsp-ammunition-20-rounds/
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Buffalo bore 450 bushmaster
buffalobore.com/index.php?l=product_list&c=229
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Hornady black
hornady.com/ammunition/rifle/450-bushmaster-250-gr-ftx-black#!/
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Or Remington acuutip
budsgunshop.com/product_info.php/products_id/61568