I've got a speed bead for the browning gold. I didn't have much luck with it.
But, then again I have one for the SBE2 and I couldn't make it hold zero either. It would hold zero while shooting but if there was ever any amount of pressure applied to it then you could visibly see the dot move. I lost confidence in it... Others like Reynolds seem to have had great success with theirs. It's not sturdy enough for me. Maybe I'm just too rough on it. lol