by gun nut » Mon Feb 20, 2017 2:07 pm
From memory these use an inertia based system to reset to the second barrel. With such a light load there is a good chance the inertia block is not getting enough of a clout to reset to the second barrel. You may find it works fine with someone else using it as grip and body weight can all change things. The easiest solution is to use the heavier cartridges. It can be possible to lighten the spring that holds the inertia block but it is a bit fiddly.
A golf course is the willful and deliberate misuse of a perfectly good rifle range. - Paul Kirchner
A few acorns up the arse'd do 'em the world of good. It might even make them walk upright for a change. - Linegeist