Hi
I would just fire it , don't get me wrong its a nice looking rifle but its not quiet mint I would say its probably had a couple of hundred rounds down the barrel already. The link below is of some pictures of my No4 i have posted them before but some time ago. These pictures where taken after I had fired 40 rounds from it so the ware to your bolt etc would indicate yours has certainly fired a few more than that , I also know there are more number No4`s out there in this condition than most people think. So shoot it and enjoy it
Lee enfield savage no4 mk1* - a set on Flickr