Plane To See

The Guru helps a reader to better understand what his scope is telling him

Dear Guru,

I’m a newcomer to the sport and my main interest is hunting. I’ve bought a second-hand Air Arms S510 which came fitted with a zoom scope. The scope is, I’m reliably informed, a ‘first focal plane’ model with mil-dots, and I’d like to know what makes it different from the standard models, and should I keep it or swap to a more conventional one.

Thanks for any advice you can give me.

NEIL COVERDALE