This is uncommon. Fifty five grain is light standard. A 223 rifle needing less than 50gr a shot is half useless. My CZ 527 had 1:12 barrel twist, and it was accurate with 62 gr bullets at 100 yards. My Browning A Bolt has 1:12 twist also, and it is accurate with 69 gr bullets at 200 yards. At longer ranges the twist rate may well come into play, but my bias is, that's where 30 caliber begins to rule, so can't testify.I shot one as a bench gun with a 1:11 twist rate. Anything heavier than 50gr shot terrible at 100 yards. Twist rate is crucial for your shooting, I would suggest a 1:8 and using the 75 or 77gr projectiles if your goal is long-range. You will also want a MUCH more powerful scope for that kind of distance shooting, along with a very good spotting scope.
Knowing Remington's commitment to LE/military, I would expect the twist rate of 1:9 if not less. Should be in the specs somewhere.