22-243 middlestead vs 22 cheetah vs ...

[venatic]

Don't throw out the 22-250 Imp! I have 2 of them, both shoot the 75gr awesome. One is at 3580fps and the other is at 3620fps. A lot less hassle than necking down some of the others mentioned and if you get in a bid just shot factory 22-250.

You can fire 22-250 ammo in the 22 Creedmoor as well or at least I have done it to get Lapua brass... In my gun it shot great

 

[Varmint Hunter]

I shot a 22-243AI for years. It was exceptionally accurate launching a 75gr A-Max (moly) bullet at 3,670 ft/sec. Shot a .625" group at 600 yds (once ).
Killed groundhogs like lightening out to 1,000 yds.

Eventually switched to 22-243 plain just for the convenience of not fireforming.

Neck down Lapua 243 brass and you are ready to go. No shortage of Lapua brass either.