I have an 81, pretty much the same thing, in 300 Savage. I would advise trying to take apart anything in the receiver. It isn't necessary anyway, for regular cleaning. There is a reason the 8 and 81s look like a Browning A-5 shotgun; they are basically the same gun.
I have never heard anyone say the A-5 is easy to disassemble and put back together. I would also advise against taking the barrel out of its jacket. That recoil spring is a monster to control. (I know, i'm spoiling all your fun!) It just isn't necessary for regular maintenance, but if you must, be sure you don't reassemble with the spring guide backwards. If you do the gun won't function. It will short stroke and fail to feed from the magazine. No harm done, but it means you have to take it apart again!
These guns aren't tack drivers. Expect accuracy good enough for iron sight hunting; three inches or so at 100 yards. They also have the annoying habit of launching the empties straight up, ten of fifteen feet. They then fall straight down....where they either ding the finish on the gun or go straight down your collar, producing a nasty burn. Buy a straw hat and wear it!
The guns themselves are a marvel of craftsmanship from a bygone era. From the rust bluing to the magnificent polish and fitting of the parts. Incidentally, you can tell when your gun was made by the date code on the left side of the barrel jacket, just ahead of the receiver. There should be two letters, the first is the month, the second, the year. Google "Remington Date codes" for the key. If there is no code present, the gun was made before 1921, the first year Remington started using them.
Good shooting
