rp premium, proball, zap, draxxus midnight and so on and so on
tippman a5 expansion chamber shocktech bolt flatline egrip, and a saw stock
flatline I bought these to specificaly use in my flatline
I have never broken a ball in my flatline or anywhere else.
Some may bounce, but keep in mind with a flatline your more likely to bounce.
I bought these because of reviews I read here. They were right I dont know about other guns or whatever, but if you have an a5 with a flatline search for good paint no more. I will never run any other paint through my flatline. Half way through one day of use i switched back to proballs, and blew 3 in the barrel out of 25. I used a 1000 core premium rounds that day, and didnt break one.