Dont know the head size but they are not tight in the barrel of any gun Ive owned, my HW80 does not seem to keen on them, you really need full power for bis mags in 22 but they seem better in 177
Ed
Dont know the head size but they are not tight in the barrel of any gun Ive owned, my HW80 does not seem to keen on them, you really need full power for bis mags in 22 but they seem better in 177
Ed
Ed - HW77 mk2 .22 + Vmach kit - HW80 mk1 .22 + Vmach kit - Webley Tempest 1979 -
https://www.harrisontelescopes.co.uk