Went squirrel hunting with my Benjamin Cayden .22 with Zan .22 cal 20 grain hollow point slugs. The entire time I was wondering if the hollow points actually expand. So I shot a squirrel and here are the results. The slug sure expanded. The first pic is where the slug stopped. The slug entered the front chest and shattered through the spine and then stopped. The second pic is the slugs expansion. The slugs I used https://zanprojectiles.com/shop/22-slugs/