OK, got the photos attached, but I don't know how to get them in line, which would be better for understanding.
Anyway, please note that the rifle shoots dead centre horizontally. The poor group @ 50m should be improved by a serious powder charge. The POI being 9cm above POA at 25m and 15-16cm above POA at 50m shows that the drop is quite small, i.e. the long barrel is getting every Joule of energy out of the powder. However, the S3 is probably exhausted before the ball reaches the muzzle, so S4 should do better.
Watch this space!
Patrick
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