should be able to make it pretty close to just as accurate at the shorter distances. However there are different challenges that need to be addressed in reduced loads relating to empty space in the case. If you're using a rifle powder with a charge weight below what the book says, I'd suggest dacron filler in the case to keep the power oriented to the rear of the case. I have had really good luck with a .308 load I found as follows. .311 165gr cast bullet with no gas check, and 7.5gr of unique. the faster burning bulky unique seems to not need a filler to run smoothly. That shoots about 2.5"-3" group at 100 yards from my norinco m14 with iron sights.
hope this helped.