Like about everyone, I have watched youtube videos of bullet expansion. I have always carried 22 handguns even when I was also in company of center fires. My old Colt Woodsman has followed me through my travels for 40 years. I was shocked to see videos that showed no expansion with 22 handguns. Ever CCI Stingers and Remington Yellow jackets fail to expand in gel blocks. I do not total believe in gel blocks as substitute for flesh and bone. I thought I noticed a difference in small game shot with hollow points over solids when fired from my Colt. So I started collecting milk jugs to do water tests. I know water test do not necessarily represent real life results either. I just wanted to see if water could make a 22 expand. I used both Yellow Jackets and Stingers in my 6" Colt and my 2" barreled Walther TPH. The Walther went through one jug and was found in the second jug with both brands of ammo. Both bullets showed picture perfect expansion. I was only shooting at 10' and got only a few drops of splash. Next the Woodsman was shot at 10'. An entirely different experience. First I was soaked along with my truck which was close by. Both bullets found in second jug. The Yellow Jacket disintegrated and only pieces were found. The Stinger remained intact but expanded and pealed off most of its mushroom. Quite different from gel tests. As an additional test I tried to determine how much further a fmj bullet would penetrate than a hard cast swc in 38 special with both loaded the same. Both were 158 grain. Again water jugs were lined up, just not enough. The swc penetrated 6 jugs completely and kept going. I only had 7 jugs left so I lined them up and shot completely through all 7 jugs. A worthless test but interesting. The gun had a 4" barrel. An interesting side note the 38 gave very little back slash, for less than the 6" Colt.