Ive used some of those 200 grain bullets from graf & son..
Alex Beer and I played around with them one day.With not a lot time or enthusiasm at the time I didn't pursue it as I should have.I am sure they will shoot .
Bruce Bertram makes 2 bullets for the 318
180 grain and the standard 250 grain

My standard load is
primer rem 9 1/2 large rifle
brass resised fire formed winchester brass
woodliegh 250 gr sp
55 gr ADI 2209 ( H4350)

good luck

sbs470