After buying my 1st air pistol, I was hooked: Weihrauch HW45.It's a pleasure to shoot, and is incredibly accurate. Some think one's crazy for spending high dollars on an air rifle, this thing is worth every last penny...
It shot as well as my decent .22LRs, meaning all 5 shots inside a 1.75" circle @ 21'.
I then realized that price mattered, as I suspected since you can buy a pistol or rifle for under $100 or over $1000.
I didn't buy the cheapest, & I wasn't going to spend the big bucks, but I have what I'd call the Toyota Corolla level of air guns.
With your BSA R10, you have a Lexus, ha ha!