The ball above cant be sliced off.
It is in the path of the bolt at rest but the ball below it must exit the breach first (pushing the second ball up out the way of the bolt).
The bottom ball will break before it is squashed in enough to let the bolt chop the top ball.
It doesnt matter what the speed of the bolt is, if the halo spring pressure is normal, there is only a light pressure on the paint, not enough to break a ball.
I guess you guys think the halo really pushes the balls in there hard, but it only needs to give a very light force to get 25bps. We have measured this.
Putting twice the wind on the spring per shot quickly builds up the pressure on the stack to the point where it can crush paint.
10 to 20 shots at double wind and you soon get to the end of the spring (or the jam sequence if you have a newer board)
It is this effect that once eliminated, allows you to shoot very brittle paint with as much rollback as you like.
The spring pressure does not start very high, it never needs to be very high and it remains at a certain pressure unless there is a problem (the goal of a good halo board is to replace the wind that has been lost, no more, no less).
FrontmanDan obviously thinks differently, all I can go off is what we have measured when designing our own halo board.
I agree it is better not to have rollback at all, but I dont agree with Frontmandans original statement that rollback will make you 'chop like crazy when shooting brittle paint', because I know from experience it doesnt.
Thats me done.
