Has anyone else had this problem with the ball not hooking? I drilled it kinda weak anticipating a strong hook based on the numbers and strong coverstock but the ball barely moves for me. I drilled it pin over MF with CG in palm and MB just rt of TH and my specs are PAP 5.5" rt 3/4" up with speed approx 14mph and revs around 350. It seems to me the ball should be hooking quite a bit but it just skids and then rolls with very little hook. The finger and side wt are near 0 if that helps with no side hole. Any suggestions???

I don't think that is the problem but can sure try taking some revs off. So far the only way I have gotten any real movement is in 2-3 game and to really come around the ball instead of up the back. It just surprised me how much it didn't hook. I have several other AMF 900 Global balls that hook plenty. I usually start with the Bank Roll drilled close to the BM and roll the ball across 15 at the arrows out to around 5 and it comes back hard.

I had the strong impression that this is a very mild reacting ball - i.e. not a ball to throw coast-to-coast but more of a down-and-in ball or maybe a ball for playing a very soft belly shot. It seems better suited for oily conditions and for playing in the track area.
It sounds as if your ball is reacting exactly as my impressions would indicate.

You said you're at 0 side and finger? I wonder how much thumb? How deep did you go with the holes. You may have to redrill it because it doesnt sound like you had a lot of top weight to begin with. I was going to tell you to bury the fingers a bit more to raise the diff but without measuring it myself I dont want to give you any definite information if I can't visually weight it. I say that because I just dealt with a gentleman who claimed his IQ went 60 ft, weighed it, and found out he was at 0. We ended up plugging it and drilling it pin under and even then he didnt have a lot of side but the ball rolled better. My definite would be to play with the surface and bury the fingers a bit more. See if that helps, if not, then you might have to consider plugging the ball. Just my .02.

Well for starters the ball is symmetrical so not sure how you decided that the MB was to the right of the thumb. On nearly all symmetrical balls after they are drilled and spun on a determinator the MB ends up just to the left of the centerline 6 3/4" away from the low rg axis or the pin.

I would suspect with that layout you are seeing very little flare as with your PAP the pin has to be more than 6" from your axis and you probably ended up with a layout something like 80 x 6 1/4 x 40 which would make me think it isn't burning up. And if you are low tilt it would make sense that you have to really get around it to see any reaction down lane. That and the fact you say it only hooks 2nd and 3rd games makes me think you should try and add some flare or try and pull the MB out on the other side of your thumb. I would put a hole either 3/4" to the right of your thumb and pitch it 3/4" right (add flare) or put a hole 2" down from your midline on the VAL (pull MB towards the weight hole). With either hole I would try to get at least 3" deep and start small if you see an improvement just keep going bigger until you like it and it is legal. Disturbing the shape of the core is what will add flare and move the ending MB.

However, before you do that though you might want to try and polish it and make sure it isn't really burning up. I doubt that is it but it is slightly possible....

Thanks for the replys so far. Will try some of them and see what happens and LYK

Dump the Mamba and get a AMF Grip!

I second that, but are they even available any more?

notsohotshot, what are the characteristics of your house's THS ?  Are you sure you're seeing enough volume for this specific piece?