I could right pages on this topic but no one reads long post unless they are personally very interested in the subject matter. So, I'll keep to the point. 
From your personal squirrel (ground or tree) hunting experience, do you find yourself going for more head/brain shots or more shoulder/heart lung shots?
Myself, I'm going to waffle a bit on my answer. I take about an equal split between head and shoulder shots. If the squirrel is mostly perpendicular to my shooting position, and the angle not overly steep, I'll always take a shot through the shoulder. But, the shot angle has to afford me pass through both shoulders, not just one! If I can't get both shoulders then I opt for the head shot.
From my long experience shooting ground squirrels with air rifles I have had more squirrels 'anchored' with shoulder shots than with brain shots. Shoulder shots prevent less ground squirrels from making it back down into their holes than do brain shots. That has been my experience, maybe you have experienced differently.
Point of impact on animals is so much more important with pellets than it is with frangible firearm bullets. Aim carefully and execute the shot my friends!
Fired this morning at 6:55. Modified Daystar .22, AEA 18.3gr, 890fps, 38yds, 5-shot groups.

From your personal squirrel (ground or tree) hunting experience, do you find yourself going for more head/brain shots or more shoulder/heart lung shots?
Myself, I'm going to waffle a bit on my answer. I take about an equal split between head and shoulder shots. If the squirrel is mostly perpendicular to my shooting position, and the angle not overly steep, I'll always take a shot through the shoulder. But, the shot angle has to afford me pass through both shoulders, not just one! If I can't get both shoulders then I opt for the head shot.
From my long experience shooting ground squirrels with air rifles I have had more squirrels 'anchored' with shoulder shots than with brain shots. Shoulder shots prevent less ground squirrels from making it back down into their holes than do brain shots. That has been my experience, maybe you have experienced differently.
Point of impact on animals is so much more important with pellets than it is with frangible firearm bullets. Aim carefully and execute the shot my friends!
Fired this morning at 6:55. Modified Daystar .22, AEA 18.3gr, 890fps, 38yds, 5-shot groups.
