If your fireball is anything like the three that I'm familiar with (mine, friends,& fathers) it will like just about anything. The little case is awesome. We ended up using H322 because thats what we all shot in our 223's. We work up loads that are safe in all three of our rifles and load in mass for our trips to prairie dog shooting. We shoot 50 gr. V-max's in both the 221 & 223 so we can buy bullets in bulk to cut down costs. I think we load somewhere around 19 gr. in the FB but don't quote me because I'm working off memory here. Our Fireballs shoot great no matter what we feed them it seems. BEST OF LUCK! I hope you love your FB as much as I love mine.