I'm using the 108 gr ELD-M in my 6mm (.244 cal) Ackley Improved. 28" Bartlein barrel, 1:8 Twist, 3225 fps. It is in the 2's and 3's @ 300 yards and less than. 1/2 MOA at 600 yards. I'm not sure how much longer the 108 gr is compared to the 103 gr. But I think it would be on the ragged edge of stable. The VLD and ELD bullets are long. Shorter bullets of similar weight like the 100 grain Speer or Nosler would be fine, my brother uses them in his 1:10 .243. But with the longer sleeker profile, I would try something in the 90's with a 1:9 Twist were I using a VLD or ELD. It doesn't some like much, but with my 1:8 Twist the new sierra 110 VLD match king won't stabilize but the 108 ELD