Can anyone suggest a reason as to why PH_POLY objects might be sticking together instead of bouncing apart? See image :-

If I change the type to PH_BOX or PH_SPHERE this sticky behaviour is not present, but of course the physics is not correct for a barrel.
Regarding Physics types, can PH_Cylinder not be added? Just think this would be an appropriate fast physics addition.
Thanks to anyone who can provide some help / suggestions would be much appreciated. Also maybe someone could take a look at this other physics cunnundrum?
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