I would say off the top of my head 100 yards is safe. However I dont know anything about that bullet. You need to call winchester and see what the minimum expansion velocity is for that bullet. Then you can take your muzzle velocity and plug it into a ballistic calculator and see how many foot pounds of energy the bullet creates at diffrent ranges. We can do it right now based on some made up figures.
64g x 3000^2fps/450400=1279 foot pounds at the muzzle
So then we take the excepted number in foot pounds to humainly kill a deer which is 1000 foot pounds, and compaire it aginst the energy the ballistic calculator gives us for diffrent ranges.
The key when hunting at ranges grater that 100 yards with a 22 centerfire is finding the right balance of muzzle velocity and bullet performance. Generaly speeking you want a bullet with a high BC to better carry your energy to the target and when it gets there you want it to expand and not pencile through. Just remember 22 holes are small so be diligent on your blood trail or shoot them in the head.
Barnes ttsx or nosler partition are good choices
Last edited by ICANHITHIMMAN; 10-10-11 at 09:25.
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