hi guys i know this has been covered time after time but i am trying to remove the factory barrel from my new stevens 308 and have broke three sets of blocks use a bench vise trying to remove it. what am i doing wrong? any thought of what to do next? all i have is a nut wrench and bench vise. i can not seem to set the barrel from sliping in the blocks and when i bare down on the blocks with the vise the blocks split. i am useing pine wood.

any thought or ideas?