Did I mention, how tough a fox squirrel is? The Indians used their hides for bow strings! Judos for grays, maybe, rabbits, they are so thin skinned, you can yell at them and they will fall over dead! But how they get thru them briars, I don't know.
The magnus heads that Ron mentions are good, and pricey. that's why I use blunted field points and banding steel. It's the "shock and Ouch" way. I also like the game nabbers, if your buying points. Bought my first ones from Ron when he had the traveling trailer shop at Marshall. Killed alot of squirrels with them.
4-5" inch, full height fletch on hardwood shafts. Your going to loose some, but hey, you ain't killin, if you ain't shootin!