Midway has nosler custom competion 155 and168 gr. Bullets on sale for 250 of them for 54.00 ive reloaded a couple 168 grains but i have never shot 155 grains. Im trying to stock up for a full auto shoot coming up that has a 600 yard range, qnd it is only 20 bucks a day to shoot your own gun on the firing line in a 20x20 space and they will put targets up for you. So i guess the guestion is should i get the 168s or the 155s i have q 20 inch sps tactical 1in12 barrel on a hs pss stock. Ive never shot out to 600 before i only have access to a 100 yard range. Thanks for the help.