Are the barbs reversing or the fish just pulling off?
I had some problems with the barbs reversing on my sureshots down in Branson. I think I wasn't tightening the tip enough after removing a fish.
I lose fish with muzzys too. I do like the muzzy a bit better than the sureshots (because I don't have to worry about a fish spinning the tip).
My suggestion is to shoot the fish through the back above the lateral line. Not as soft there. (as if I could just pick my arrow placement like that... ha!)
The three and four barb points look like they would really hold. I haven't tried them yet... I'm waiting for one of you guys to buy some.