Hmmmm well yes using binos when a deer is fairly close, 100 yards and under, can lose you the opertunity to shoot however a lost opertunity is far better than scoping someone with a loaded rifle
and yes I have lost the opertunity of a shot because I was evaluating the antlers. It happened two years ago on a 6 pt Roe Buck in Hampshire. In Roe Bucks 6 pt is the normal mature head
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There will other 6 pt Roe and the chance of actually scoping someone there was almost nil as apart from the farm workers there was only us stalking on the place. I not only use 8x44 Binos but I also have a two draw telescope that is 20-60x magnification that I use for viewing deer and evalating the potential of them. It's useful for scoping Does as well and Bucks/Stags as here we have seasons just for Does.
Now as for for shooting with high powered scopes. Most people cannot hold anywhere near steady enough to actually see the target properly especially freehand. Off a Bi-pod or rest it's another matter and if you have time to use either of them you have plenty of time to use the binos
. About 8x is the most that your average shooter can cope with free hand, of course there are the minority who can hold much steadier and can actually use higher magnifications free hand, but if we're honest most of us cannot do it. I took a Pheasent off the field last evning using a .22 LR which has a 6-18x40 Simmons competition scope on it. The magnification used was 6 times and I shot through the open passenger window of the Jeep from the drivers seat resting both elbows. The shot was about 70 yards. Sure I could have wound tha mag up but only resting on the elbows is not the most stable of position so why complicate matters?