Good evening. problem occurred today at the range : while shooting i felt something wrong..Good groups enough, but these groups were shifting from left to right and viceversa and high to low ( and viceversa).. I rembered i substituted oringinal mk III canadian rear sight that is a mk2 pattern, with a sort of mkI rear sight i took from a No.5 jungle carabine. Why? Beacause it has fine vertical adjustment..
Slide swing left to tight in a adiagonal pattern under light fingers pressure. Probably this is the cause of groups' stringing. How could i fix it?

Teflon between leaf and slide... a new backsight...? Saturday i have my first 2013 competition so i have not the time for the shipment of the new backsight..
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