Can I repair the striker holes on my gun?

Gun repairs
MIKE GEORGE
It sounds as if you are well overdue for a visit to the gunsmith because, the more you continue to fire the gun, the worse the problem is going to get.

It is quite possible for the striker holes to be restored to their proper diameter.

And, considering the gun has degenerated to this point, a good general overhaul at the same time would be a very good idea.

And do get the work done: affordable English side-by-sides like your BSA are pleasant to shoot, but just not made any more.