I have two 22 CHeetahs, both Mark II, one custom Shilen DGA and one heavy barreled Rem 700 sleeved BR stocked. Great cartridge and shoot 52 grain Bergers into a ragged hole. If I want to shoot a heavier bullet, I move to one of my hot 6mm's, 6x284, 240 Gibbs, 240 Weatherby or 6mm Mach IV. Get yourslf a CHeetah, you will not be disappointed. Every so often one pops up for sale on the gun auction sites.