I am a 22 Hornet fan! If you plan on any cartridge shooting 35 A-Max to 50 grain boat-tip bullets you need a 1:12 or slower twist. Hornet brass of best Quality is hard to get in the best of times. I found Nosler 22 Hornet brass at Midway about 3 years ago. Their "Ready to load" quality, is all within .001 in OAL and the primer pockets are trued, and the flash holes are uniformed and deburred. They are sold in 100 count boxes that all weigh within .1 grain or better (my last batch were within .05 grain)
I also bought a 250 count bag or "Need Prepared" quality. After I did the prep work they were ALL within .1 grain.
I also use their (Nosler) 221 Fireball brass, it is so much better than any Remington brass I came across. It was the Ready to load quality (and 2 boxes of Nosler loaded Ammo.
I believe both of these brasses were Midway exclusive products.
Both the Hornet and the Fireball have exceeded my dreams in 10" Contenders and my 24" rifle (1958 Savage 340). The rifle gets 1/4" groups at 100 yards, using Hornady 35 grain Hornet bullet at 3100 fps, at 3150 the group is 1" and at 3200 it is 2". (Using Accurate 1680)
If you want to shoot 55 gr FMJ/BT military bullets you will need a 1:10 barrel. With the Hornady FMJ, don't expect better than 1 to 1.5 inch groups or worse at Hornet velocities (2200 fps in a rifle)!
A number of people I know tried Little Gun in Hornet, 218 Bee and 221 Fireball, and all had cases rupture well below max load. The time proven powder for 45 semi spitzer bullets, has been IMR 4227 since Wheelan Townsend converted 22 WCF to the smokeless 22 Hornet. Lighter bullets seem to preform best wit A 1680 or 4227 (some people like 2400, but I got better performance/accuracy with 4227!)
Lastly, one of my friends has a Super 14" Contender in 22 Hornet. He swears he gets the tiniest groups with his pistol, and he dose! But he sacrificed velocity for that accuracy! He is shooting about 1300fps. My 22 RF Super 14 does that with R100 RWA ammo and I don't spend the time loading!
Ivan