Not a simple matter of a bullet going through a stiff supported surface and leaving clean holes.
That's not completely true...... The bullet that allegedly created this ragged teat , CE 399 was nearly pristine....It sure as hell wouldn't have created this kind of damage .... I would agree that CE 399 may not have created a neat little hole.....but it would NOT have created this ragged tear either.....
Mason and you are barking up the wrong tree.
"The initial entrance of a bullet into fabric is generally circular or elliptical,
depending upon the angle of fire. If the bullet has been unbalanced in flight,
it may strike with a wobble or end over end; in either case, the hole is likely
to be irregular in form. The size of the bullet hole is only roughly characteristic
of the caliber of the bullet. If the bullet has met the fabric obliquely, the latter
may be abraded on the near edge to present an appearance similar to that of
moth-eaten area."
"As might be expected, the fibers at the edge of the bullet hole are frequently
pressed through the hole in the direction of passage. This finding is not
sufficiently constant, however, to be considered with any degree of assurance.
The explosive action of the bullet and gases in some instances causes a reversed
appearance."
"In estimating direction, due consideration should be given to the fact that the
clothing is generally free to swing and assume positions other than that of the
surface of the body."
-- Excerpts from "Bullet Holes and Chemical Residues in Shooting Cases"
Joseph T. Walker, Journal of Criminal Law and Criminology, Winter 1940
Here's another one for the clothing bunch:
"By lining up the holes in the clothing with the entrance and exit wounds,
it can be determined whether the victim was sitting, standing, slouched,
or in another position."
-- "Gunshot Wounds" (
Link )