A federal judge yesterday reduced to eight months the 2-to-6-year prison term he had imposed earlier on a Maryland meat packer convicted of charges of shipping nonfederally inspected meat into D.C.

U.S. District Judge Howard F. Corcoran originally had sentenced James Austin Fraley Jr., of Thurmont, Md., last year, Eraley, who has been free pending an unsuccessful appeal, must report to the Allenwood, Pa., federal prison camp in two weeks to begin serving his sentence.

Fraley, who has been placed on probation twice in the past 10 years for similar meat-inspection violations, has been called by federal prosecutors the "No. 1 violator" of meat inspection laws in the country.

In the current case, he was convicted of 44 counts of shipping allegedly slimy and moldy meat for sale to two of his meat markets in the District. One of the conditions of his release after sentencing and the sentenciing itself is that he can no longer work in the meat industry, except as a supervised employee.

Corcoran gave no reason fro reducing the sentence. In earlier proceedings, he had called Fraley a "danger to the community . . . as long as he continues operating his plant."