I had bought a box of 180gr SST's to use in my Win Mag but after reading of the explosive impacts I'd rather not use them for that application. I in stead thought of l I ading tgem in my 308 forca medium range load. Loaded over 43 to 44 grains of RL15 shoild put me around 2500 to 2550fps out of my 20" 308. How would this be for deer up to b lack bear at no kore than 250 yds but a more likely 125yds?