"if maybe a heavy weight bullet around 165 to 180 "
165 up to 175 are not heavy for the 308 anything over 175 is a heavy bullet go the 308 winchester so the 180 is just on the heavy side. I use 168 gr Remington bulk bullets in both my savage 10fp-le-2 and 14.5" encore barrels and am getting very good results.
I am using the same data for the military match loading

with IMR 4895 and national match brass