I experimented with that bullet last year for the first time and after tweaking the powder it became the new load I hunt with. It shoots really good groups for me. I started with 80 gr and it didn’t group all that well. I increased by 5 gr each time and my sweet spot landed at 95 gr. That’s 777 powder.
One other point…for me it shoots bad with a clean barrel. I foul the barrel and run a spit patch and then it’s good. I can shoot 3-4 shots before I start loosing confidence in my groups and/or a dirty gun with some potential to misfire
I shoot the 420 out of a cva optima 85gr of triple 7 and it groups good. My brother has the Acura and his shoots better than mine with 100gr of pyrodex select but his first shot is way off on a clean barrel