1/9 is not guaranteed to stabilize anything heavier than 69 grains. Some will, some won't. I wouldn't take a chance on a large purchase to find out they don't work in your barrel.
Sierra 52/53 grain match king bullets hammer from any twist rate barrel you shoot them through. I get under 1" groups at 100 yards with 1/7 twist barrels on a routine basis. 69 grain bullets are a better choice for shots past 200 yards.
65 grain Game King bullets are a hunting option, very accurate from AR-15's.
60 grain hollow-point .224" bullets are a great general purpose bullet for use in .223. I love Sierra bullets but haven't bought that many lately simply because I purchased a large volume of Hornady match bullets in bulk. I still use Sierra bullets when I shoot tournaments.
Buy your bullets in 500 bullet boxes, they are discounted slightly for doing so. I always shop Widener's, Powder Valley, Midsouth Shooter's Supply, Graf and Sons and a few others before placing an order.