I find shooting standing off hand quite difficult. I would be very interested to know what size groups you guys get at 100 yards with your hunting rifles.
I'l tell you now, last time I practiced, 5 fairly quick shots out of my pump were a pathetic 6 inch groups and over. Sometimes a lot over.
I would not shoot at an animal this far without some kind of a rest for this reason.
Tough question to answer accurately.
Most of my off hand range shooting is done at 200 yards. We have a ten inch gong out there that I pretty much never miss. My best range (witnessed) offhand shooting was at a 5 inch steel ball hung at 200yds...Using my ZKK-602 in 375Wby with a 2X Leupold mounted I hit it 8 out of 10 times....That is good shooting (for me).
My best offhand game shots came on wounded game.
The first (my buddies elderly father's took the first shot) was a spine shot mule deer in tall grass 160yds away (if memory serves the laser said 166yds). The deer's head would momentarily pop above the grass as it flailed about so (to stop any further misery) I snapped the rifle to my shoulder and shot it in the head.
The other was to finish off a buffalo. My buddies wife made a great initial shot (scoping herself in the process), but as sometimes the case the bison didn't understand he was dead yet. They handed me the rifle and while they performed first aid asked me to dispatch the animal quickly with a headshot (this was a meat bull). As soon as I got the rifle the bull started to go so I ran in a big semi circle and got 150 yds broadside...Stupid bull saw me and decided to ramp up the escape. I aimed for his eye and missed it (low) by just under an inch...he didn't go down so (assuming I miss-lead and shot too far forward) I aimed for the base of his horns...which I hit perfectly.
Under normal circumstances I would never take such a shot without a solid rest. If possible I will find a rest for a 50 yard shot. In fact I shoot very little game using completely unsupported offhand.
Also, to be honest there are the occasional days that I go to the range where well....Things just don't come together for me...A real windy day pretty much guaranties that effect.



















































