Mr. Cunningham. Yes; you asked for our first two tests.
Mr. Eisenberg. I see. Okay. Can you show by use of that photograph, Exhibit 607, how you were able to determine that certain of the bullets found in Officer Tippit were of R-P manufacture, .38 Special, and certain were Winchester-Western?
Mr. Cunningham. Yes.
First of all, in the manufacture of these bullets, each manufacturer has his own specifications for how they are to look. By that I mean generally that both manufacturers' bullets are similar. They are similar in weight. They are generally similar in size and diameter as well as length. However, the number and the spacing between the grooves—these grooves, the cannelures, are not similar. It is actually a knurling process, you can see the knurling marks.
Mr. Dulles. What is the purpose of those?
Mr. Cunningham. Lubrication grooves. .38 Specials being lead bullets—in order to keep down excessive leading they put in a lubricant—Remington-Peters—they use a very dark heavy lubricant. Western-Winchester, they use a very light-colored waxy type of lubricant.
Mr. Dulles. Thank you.
Mr. Cunningham. Up above you will see a small groove. It is nothing more than just a slight groove. That can be caused when the case is crimped, the bullet is crimped into the case.
Representative Ford. That is in the R-P?
Mr. Cunningham. On both of them, sir.