Yes, it used group well. It has a bit of an odd history. I bought it of a friend from the gun club we used to go to after something went wrong when he fired it. I can't remember what he did, but I think he may have not pushed the breech down before firing and after that the breech popped up every time he fired.

I can actually pull the breech out completely when it pops up for loading and I'm not sure if you're supposed to be able to do that. I took it to someone who said he fixes air guns, but it's still not right. I would think like you, that the breech should align exactly with the barrel for the pellet to enter the barrel perfectly and produce an accurate shot. I can't be sure that this is the case after what happened or if what happened affected the accuracy or even if it can be put right.

There's a lot of ifs and don't knows there unfortunately.