I recently picked up a box of Federal Hydra-Shok 124gr +P+ with the intention of using them for SD in my Kahr P9 instead of the 124gr +P Gold Dots I've been shooting. Unfortunately I don't have a chrono, so my thought was based on reading that the +P+ round in a shorter 3.5"-4" barrel would essentially be equivalent to the +P round in a standard 4.5" - 5" barrel. In addition, that the velocity from a longer barrel may be too fast to allow the bullet to expand. Anyway, it wasn't until I opened the box that I determined that I had the old model Hydra-Shok versus the new design bullet without the center post. Inasmuch as some reports claim the post can fail to work as designed when shot through a couple of layers of clothing, I got to thinkin'.... That is, would it be crazy to use something like silicone caulking to fill the hollow tip of the Hydra-Shok bullet, much like some of the new design bullets with the polymer tips? Has this been done before and tested, or is it an inane idea??? Would it in any way affect potential liability for "altering" the original bullet design? And, thus, may not be worth the effort even if it makes sense??? This is a serious question, as crazy as it may sound. If it's nuts, kindly say so. If not, your thoughts would be appreciated. Thanks.