Was looking at some 9mm 147g +p at both places, Double Tap is more than Buffalobore... is there an advantage to one brand vs. the other? DT- Ballistics : 147gr @ 1135fps / 421ft. lbs. from a G17. Glock 19 velocity - 1120fps. BB- 147 gr. Jacketed Hollow Point (1,175 fps/M.E. 451 ft. lbs.) Who uses what and why?