I like your target! I use those 1" orange stickers too, but I like how you've arranged that with the ammo name.
I have a 452 I gopher shoot with (When I'm lucky enough to get out west) but it's the CZ I target shoot with sometimes as well. Overall, it far prefers standard velocity ammo and among it's favourites-CCI Standard Velocity and SK Standard. I did need an HV ammo for gophers though. I tried, what I though were...all of the "better" HV ammo types with little to show for it. In an act of desperation, I tried CCI Blazer and it shot consistently decent groups @ 50 yards. (3/4" or better) It's not consistent stuff so fliers are inevitable, but it sure is "gopher" accurate out to about 100 yards-more often than not.