I have some 180gr Speer Gold Dots because my understanding is this is what most LEO's use. I've been using them for a while, did some range testing and they seem to work fine. I recently found a sweet deal on some 180gr Federal HST ammo, so I now have some of that too. I went to the range today and tried it out for functionality just to make sure it works OK, and I actually like the way the recoil feels better with my Glock 23, doesn't make much difference in my 27. I am just curious which would be better for both guns and why. I am leaning towards using the HST in my 23 and Gold Dot in my 27. I am also planning to get a 4th gen G22 at some point, and I am curious as to which would be better for it as well. Any input would be greatly appreciated. Thanks.