Question on 223

[GUNNUT1951]

I HAVE JUST PURCHASED A WINCHESTER 70 STEALTH IN 223 IT HAS A 26" HEAVY BARREL IN A 1 AND 10 TWIST . THE GUY I GOT IF FROM SAYS IT SHOOTS 52 GR. WITH HIS LOAD FOMULA REALLY GOOD. BUT MY QUESTION IS WITH THIS TWIST SHOULD IT SHOOT THAT LITE OF A LOAD I HAVE ALWAYS SHOT 1 AND 9 WITH EVERY THING FROM 50 TO 72 GR. MY LAST 223 LIKE 68 GR. BUT IT WAS A 1 AND 9 . SO I AM LOOKING FOR SOME INSITE ON HOW HEAVY THIS BARREL SHOULD GO UP TO I KNOW I AM GOING TO HAVE TO COME UP WITH A POWDER LOAD AND A BULLET LOAD . BUT HAS ANY OF YOU SHOT A 1 AND 10 AND HOW DOES IT PREFORM WITH HEAVIER LOADS.

THANKS TOMMY gun)