You should have bought a 457 when you first seen them bsa.
With a spring change mine is down to a 12oz. trigger pull. I have another spring to take it down to 8oz. if I'm so inclined.
Most of my rimfires run around that 12 to 16oz. pull weight. My old Squirrel rifle is at 6oz. and the Rem. 541/581 is at 9oz.