U.S. Chief Judge Bruce S. Jenkins Thursday resentenced Addam Swapp to 15 years and 10 months for his part in the bombing, shootings and armed stand-off at his Marion, Summit County homestead in January 1988.

Jenkins increased Swapp's sentence by a total of 10 months. But he imposed far less than the approximately 22 years that government lawyers thought he should have under new sentencing guidelines.In a strange, 2 1/2-hour session that overlapped the time originally set for the sentencing of co-defendant Vickie Singer, Jenkins ended up effectively throwing out one charge against Swapp and ordering concurrent sentences in other charges.

Swapp was convicted on seven counts - blowing up a stake center, using an explosive in that crime, assault on federal officers, use of a firearm in the assault, resisting arrest, use of a firearm in resisting arrest and possessing a sawed-off shotgun.

Jenkins boosted the recommended sentence on the first count up to five years but then said he was doing it because the federal sentencing commission recommends an additional 10 months for using an explosive in