JSH,
I've tested the Varmageddons extensively, and as with other hollow-points they don't expand like plastic-tips, whether Varmageddons or others. The difference becomes more obvious past 200 yards--but the .224's still expand, working as well as any other hollow-point bullet I've tried.
Accuracy depends on the individual rifle, but I've shot HP Varmageddons in various .17, 204 and .224 rifles and accuracy is normally very good, no matter the twist.
