I handled a 25L in the shop and came close to purchasing, but ended up opting for a HW30s for my 6-year old lad / 9 year old daughter. It's a little heavier than the 25L but benefits from the better Record Trigger, slightly larger stock and puts out 7-8ft/lbs so will perhaps work for them a while longer than the 25L. At 10, yours is perhaps between Junior and Adult rifles. I had my first at 11, a BSA Mercury and got on fine with it (Father still uses today).