I watched the videos. To begin with im no expert, but gel is not a good material to test penetration or expansion. The only way to test how a bullet will perform on deer or whatever you are shooting is to shoot a the actual target. The ammo they were testing was way under velocity, so they are not going to perform well, expansion will be off and will cause the bullet to tumble, especially in gel. Im shooting a 185 grain with 100 grains of triple 7, that will push that bullet very well so velocity want be an issue, neither will penetration. Im going to do a phone book test, ive found this is the best test for penetration and expansion, but most people just tape a bunch of phone books together, not good, its best to soak the phone books in water until they are completely saturated, gives them more of a flesh feel, but anyway, i just want to kill some deer, my freezer is empty, good huntn you'all