yes that would be very quick for a 200 grain bullet. How do they shoot though. Speed isn't anything if it can't hit anything.
I've shot about 1.5 inches at 200 yards with a scoped 460 S&W Encore handgun with a 15 inch barrel (including brake). With that load I've taken:
1. A Zebra.
2. A Red Hartebeest.
3. A Klipspringer at about 180 yards.
4. A Vaal Reebok.
5. A couple of Cape Grysboks.
6. A Duiker.
7. An Impala.
8. A European Fallow Deer.
9. A Steenbok.
10. A Kalahari Springbok.
I did find the 460 S&W Magnum to be one of the pickiest cartridges I've loaded for. I get about 2,350 fps out of my braked 15 inch barrel using Hornady 250 gr. SST/ML bullets.