Noticed the shotgun page.
I have a 12g "Lanber" sg which is Spanish made and is all things i could wish for in a shotgun.
I felt it was a bit 'front' heavy so I took off the recoil pad and pushed in a 1lb sinker up the bolt hole in the stock. This has made the balance much better and has reduced the recoil noticeably.
Sadly I have seen on the net that the Lanber co has gone under for whatever reason.