The match HP's are very lightly constructed and will come apart pretty easily. 75 and 80gr. Hornady A-Max bullets are supposed to be more heavily constructed for larger game as well as the 75 gr. Swift Sirroco's, but they're too long to be loaded to magazine length in an AR type rifle. I've always used 68 gr match hp's - also fairly light in construction, but extremely accurate. AR's with 1:9 twist rifling shouldn't have any problems stabilizing bullets 60gr and heavier. Most don't tend to get finicky until you get lighter than 60 grains.
Personally, I don't think there are many options for a heavily constructed, expanding bullet in the .224 diameter. However, my .223's are used almost exclusively on coyote sized targets, so I have no problems using the HP's.
