The Remington gold colored high velocity hollow points have always worked very well for me on squirrels. The few bullets that I have recovered mushroomed perfectly. But I really prefer to use my Marlin 1894CL in 25-20 WCF for small game. I rarely use a shotgun but once in a while it's fun to pull out my old Creasant Arms SxS 16ga for squirrel hunting.
Wish you could use centerfires here. I had a 308 load with 5gr Uniqie and 100gr Speer Plinker that was very accurate in my rifle. Only rimfires allowed here.
