I don't get it. That's usual, BTW - but I thought everything after the iR3 HAD a straightfaced bolt, and it was only previous gats that the concave face that made balls roll back?
i played on sunday with my A4 and halo B had no problems at all apart from a little drop off at speed but thats not the halo's fault.
senesi work perfectly i had a couple of barrel breaks but that was all NO CHOPS NO SOUP!!! and according to the lcd i hit 24bps (i know thats only for the quickets 2 balls) so if you set up all your gear properly you will not have problems.