                IN THE UNITED STATES COURT OF APPEALS
                        FOR THE FIFTH CIRCUIT



                             No. 02-30224
                         Conference Calendar



UNITED STATES OF AMERICA,

                                          Plaintiff-Appellee,

versus

ELVIN PIGOTT,

                                          Defendant-Appellant.

                       --------------------
          Appeal from the United States District Court
              for the Eastern District of Louisiana
                      USDC No. 01-CR-84-1-T
                       --------------------
                         October 30, 2002

Before DeMOSS, BENAVIDES, and STEWART, Circuit Judges.

PER CURIAM:*

     Elvin Pigott appeals his guilty-plea conviction and sentence

for conspiracy to distribute 50 grams or more of cocaine base and

distribution of 50 grams or more of cocaine base in violation of

21 U.S.C. §§ 841(a)(1) and 846.   Pigott argues that his guilty

plea lacked a factual basis because his indictment charged him

with offenses involving 50 grams or more of cocaine base but a

lab report determined that the substance had a net weight of 67


     *
        Pursuant to 5TH CIR. R. 47.5, the court has determined
that this opinion should not be published and is not precedent
except under the limited circumstances set forth in 5TH CIR.
R. 47.5.4.
                            No. 02-30224
                                 -2-

grams and contained only 27.5 grams of pure drug.    We have

already held that for purposes of cocaine base the relevant

consideration is the total weight of the mixture or substance,

not the weight of the pure drug alone.     See United States v.

Cartwright, 6 F.3d 294, 303 (5th Cir. 1993); see also Chapman v.

United States, 500 U.S. 453, 461 (1991).    Therefore, Pigott's

argument fails.

     Pigott also argues that his sentence should be limited to

the 27.5 grams of pure drug because a recent Sentencing

Commission report calls into question the constitutionality of

the disparity in penalties for offenses involving cocaine base

and cocaine powder.    Pigott has filed a motion to supplement the

record with the executive summary of the Sentencing Commission's

report.   We have previously rejected equal protection, Eighth

Amendment, and due process challenges to the disparate sentencing

provisions, however.    See United States v. Wilson, 105 F.3d 219,

222 (5th Cir. 1997).   Absent an overriding Supreme Court

decision, a change in statutory law, or an en banc decision of

this court, we are bound by our prior precedent.     See United

States v. Zuniga-Salinas, 952 F.2d 876, 877 (5th Cir. 1992)(en

banc).

     The district court's judgment is AFFIRMED.    The motion to

supplement the record is DENIED.
