I have a savage  I couldn't get the nut loose. Took it to a gun smith  he couldn't remove it .He had a special press with attachments  just made for gun smith.  Simple fix was  a action fixture and a firm hit with a block of wood on the wrench. that turns the nut.  Many of problem barrel can be removed  by holding both the action and the barrel  as close together and giving  one a firm heavy  hit .                           Larry
				
			
	








