Every year I have been lending my grandson a 303 British No. 4 MK 1 for deer hunting with 200 grain 314299 Lyman cast gas checked bullets over 30.0 grains of IMR-4895. With this rifle I can easily put 5 rounds in 3" at 100 yards. This year he shot several times out in an open field and can't seem to hit anything with it. So his father, that seems to be having the same problem got together with his brother and purchased a Remington 783 in 308 with a scope for the child to use this weekend (Saturday and Sunday for deer hunting) with purchased 180 grain jacketed bullets (Federal). They went to a public shooting range and fired half a box of cartridges (10 of them) at 25 yards, missing the 16" square target on the first 3 or 4 fired. After making many adjustments they finally got the bullet to hit 2" high and 1-1/2" left of center, and called it good and came home. Stating that the rifle was ready for those long shots the grandchild might make when he first handles the gun in two days. To say the least I am a little uneasy about this situation? I have lots of both factory and lead bullets I could load for this 308, but time is not on my side and the Son who bought the rifle for the grandson insists that it was set up for Federal 180 grain bullets so forevermore thats what should be fired in this rifle?