dstanek,
Drillings will not help you make one ball emulate another, when the base specifications of one, the Depth Charge, are so dissimilar to the second, the Matrix III.
Here's Ebonite's spec page for the Matrix:
http://www.ebonite.com/products/product_page.php?PRKey=69&Submit=GoThe Depth Charge not only has a significantly lower RG, around 2.45, comapred to the Matrix's 2.55, it also has a significantly stronger cover, a 3% particle load, pearlized cover, compared to the regular pearl resin cover of the Matrix. Plus the cover of the Matrix is realtively mild by today's standard's.
The Ebonite Showtime pearl might be a better starting point to emulate the Matrix III. (Possibly, one of the Element series might be a direct replacement.) The Depth Charge will handle heavier oil and hook a lot more; it may hook too early on lighter oil that the Matrix was able to handle.