Wide and heavy blunts very rarely bury into the soil. Year ago I used the rubber type blunts that simply slip over the shaft . Would take a heavy field point and grind away the point to make it flat nosed . It adds weight and the rubber blunt lasts longer ,,,,of course I was shooting aluminum and without the field point the shaft would cut clean through the rubber in just a few shots.
I seems that I need to aim where the squirrel MIGHT be after the release . The last few I have shot at ,,,,all under 15 yards ,,,seemed to have changed zip codes and are missing some tail hair as well .