I've used 900 Accuball "Iniviballs" (Black shell, white break) and had 1 break. They are very accurate and fit nicely in my 14" Terminator barrel for the Raptor SE. Balls are consistant in size and shape. The best part is my opponents have a very hard time seing where the balls are coming from when we play in the woods. But is very easy to tell if your getting close to hitting them cuz you can see the white break. One of my favorate balls (I've used many types.)
Price is a bit higher than some paint.
The only accuball I've use is the Invisiball, so this review is only for that one type.
Works great with the Terminator barrel on a Raptor SE.
Balls are very round and no dimples.
They weigh 10.7 oz per 100.
It's a bit pricy, but worth it if playing in the woods or dark condition and you want hits.
The balls are very reliable on breaking on the opponent, not in marker.
I would recommend these ball in the playing conditions mentioned. There's other balls for playing in open field and bright days.