I broke up and sold my last. 20 cal rifle. It was a mk4 triggered rapid and was a laser - my go to hunter. I also own 22 and 177 rifles.
20 cal was the best sub 12 hunter for me but the fact that people are so stuck to 22 or 177 (it's an engrained belonging in the UK, it's seems) means that 20 cal won't get going. I had a fear that the ammo supplies would dry up and jumped ship but she was defo my favourite.