Just got some Bear Creek hollow back 200g bullets in .45 ACP to try out in my Kimber. The plan is to stick with WST, as this is a moly coated LRN. Range load 4.5 - 5.0 at 1.25 OAL based on this Hodgon data Bullet Weight (Gr.) Manufacturer Powder Bullet Dia. 200 GR. CAST LSWC Winchester WST .451" C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure 1.225" 4.4 830 15,400 CUP 5.1 910 19,900 Anyone have any experience with these bullets? What about the COL, does the hollow back affect pressures/velocities drastically. Wanna kill these ads? We can help!