Using my Model 13 BSA small frame Martini this afternoon, after confirming zero @ 100 yards, I decided 200 yards was the next hurdle to find clicks up.
On my rear peepsight, after some test firing and spotting between shots on a large piece of white target paper and a 5 X 7 inch 'Orange Peel' high visibility target in it's centre.
Confirmed 60 clicks up from 100 yard zero, gave correct elevation for 200 yards with Federal Ultra Match 22 LR ammo, by trial and error.
There was a slight breeze right to left. Hence a 7-8 inch group to the left of black, in an oval kind of shape, 5 shots @200.
Thankfully the wind died, and the next three shots, made it into black, about a 4.5 inch group.
This is the best I can ever manage, with iron sights,and this older rifle, I am pretty sure.
That kind of oval shaped target, is very hard to centre at this distance, with these old eyes.
Maybe, just maybe, those of you with similar .22 LR BSA Martini, with it's factory tang-sight too, can use this as a frame of referance.
Cheers
PS: I wanted to use Lapua Standard Club for this shooting session, but I just ran out very recently.
Therefore more costly Federal Ultramatch was used instead.
Edit: On both mine and Silverback's Model 13 BSA, our 100 yard zero, reads about the number 30-35 on the sight scale, using good ammo. Strangely though, at longer distances, the zero really deviates between our two rifles.