Re: BSA, 6 - 24x40mm (or 50mm).
I have no first hand experience with them, but my brother owned one. He put it on a 243 and the scope only lasted a few rounds and the rifle could not be sighted in after that. He sent the scope back to the company and received a new one. When he pulled the brand new scope out of the box, there was a distinctive rattle in the scope. One of the lenses had come loose inside, and this was a brand new (never been mounted) scope. He sent that one back to the company and they sent another new one. He turned around and sold it without opening.
Based on that I would not reccommend one.
Learn from others mistakes, you won't live long enough to make them all yourself