I agree with Jim. But for fun could our elaborate on this Roger? Rotating the square peg allows for 3 point to blow out. The two sides and the center.
I am about to cut some long tenons on the bottom of two kings, they will be wedged with half round wedges and single round hole as the keying mechanism. This will be replacing a squarish tapered wedge on the underside of the tie. Much simpler to cut all around. 2" rived peg stock split down the middle for the wedge.
