8x57- I recently purchased a .577 Greener Empire locally. I was fortunate enough to be able to shoot it before purchase. Other than being intimidated by the size of the rounds I was pretty much gone from the moment I picked the Greener up. Test fired and purchased. I havnt looked back.
It has performed very well for me on several trips with some nice game being taken with it. Im also enjoying loading for the Light Nitro.
Had approval from the minister of finance before, test shooting. Made the decision much easier. No regrets here.
Cheers Mick