Gentlemen if I use this firearm for 300lb deer in Canada < 150yds shot do I need to think about the 160 round nose for Maximum knock down or will a 140 gr premium bullet suffice? I would like to have one all around deer load and I hunt smaller deer in the woods in MN and SD. Therefore the Canada Buck is the benchmark. If this is too much monkey business I can just use my 300 Win Mag, however the little 6.5+55 is much easier to shoot from the tree stand. Thanks Buckfever