Man O man, geometry is every where, even in the arc of the sledge hammer used in driving the wedge. If you just place the wedge so as to make contact, home, than the above statement of 1/8" of shrinkage would be more than likely be true. Now apply some force behind the wedge and push it beyond home say 1" or until it just simply stops. Now how much withdrawl will you have? This should be calculatable, if we know how much futher the wedge is driven, this is still unknown. They very from 1"-3" beyond home. 3" is more likely due to a cutting error. I suppose one could even dry the wedge in an oven just before it is applied. Driving the wedge is different then driving a peg, there is no relish to blow out, this is when using a draw bore. These are just some thoughts bank around in my head. Tim
