HaGar43,

They make two sizes of WB's. One has a stantard size hole to use with aluminum arrows and one has a smaller hole for use with carbon's. When I used the WB I had the carbon one and shot carbon's fine but when I shot my 2219's they wouldn't fly well at all, fishtailing sort of. The grip was too tight even though you could seemingly pass the arrow through the rest easily. Your arrows may be too little spined as well. You didn't state your arrow length so I'll guess your arrow are 27-28"? You are right on the border to step up to 2219's. If you can try using a field tip of 75-100grs and see if you still get the right tear. If you don't get a tear with the 75 or 100gr tips then you are underspined to shoot the 125's on the 2216.