So I am reloading for a Remington 700 5r in 223 and it has a 1 in 9 twist and I am using 69 grain barns match burner projectiles and sig sauer brass and I am using tac powder and varget I followed the book going from min to max in .3 increments loading 5 in each increment. I still need to sight the gun in so should I sight it in with factory match ammo or should I load up some others and start at the min load and then test the others