I have several springers, including a couple of Beemans. They all shoot great, altho I can't say I have ever benched one. I would try the following:
Make sure all the screws mounting the rifle to the stock are tight. I can tell when they start to loosen on some of my rifles, as the accuracy suddenly goes south.
Make sure the scope is secure in the rings, and tight against the recoil stop if there is one.
Make sure the scope is working - if the rifle still has iron sights, pull the scope off and see how it shoot with the irons.
Shoot some groups at 7 to 10 yards. My rifles will all shoot 1/4" groups or less at 8 yards, off hand.....
Try cleaning the bore.
Inspect the muzzle to make sure someone didn't jack it up cleaning it.
