I was trying to find what round PU scopes are calibrated to be sighted to in terms of elevation and windage, I am assuming that it was meant to be used with standard light ball ammo but I know heavy ball ammo was also used.
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Yes, PU scopes distanse settings are for the light ball (like M91/30 rear sight). For heavy ball according to manual +1/4 of distance setting should be added forr distances up to 700 m.