Can anybody tell me roughly how many subsonic rounds I should expect to have to fire through my new HW66 before any level off accuracy can be expected please? All my previous 22's have been bought second hand, so I've no idea.
I've put 120 rounds through it so far and it's still shooting like a 12ga with an open choke. 6 inch 5 shot groups at 50 metres.
I'm quite experienced with rifles, so have checked all the usual suspects (stock screws, mount screws, ring screws, mod on/mod off, Eley and Winchester ammo, barrel is free-floating etc, etc) the S+B scope came straight off my 17HMR so I know that's not faulty either.
The rifle was bought brand new and was factory screw-cut so there should be no problems with the crown.
Is it just a case of more lead required through the barrel?
I look forward to any replies from those more in the know about new .22lr's than I.
Thanks in advance.