Diana 22 Pellet Preferences and other stuff

I have only shot Benjamin 14.3 hp through mine, they are amazingly accurate. I didn’t know guns were hold sensitive. I’ve shot arms resting, and standing, normal way you’d hold a rifle, no difference I can tell. Speed I’m not sure, but misses at 75 feet blow a nice hole out of the backside of newish treated fence pickets. 
 
The 460 Magnum would do well with 15.89 JSB's, 18.13's. 16 grain Predators.

I wouldn't continue using 14.3 grain CPHP's, unless they have some resistance in seating. Most Diana's have a tight bore. But try different weights and feel out that shot cycle.

If you want a crazy accurate smooth shooter contact John Thomas, AKA John in PA. 1 (717) 873-5128