I suspose the double barrels takes some of the precision out of the long range express sights however they should be capable at descent hunting ranges. Have you tried them at longer ranges, say 200 and 300 yards?
: The 3 leaves on my 14 bore rifle are perfectly zero'd at 100 for the standing sight, 150, 200 and 300 meters for the leaves. Nothing obtimistic about those.
: Forwyth's double 14 bore rifle was good to at least 250 yards, as he made a good shot on a Sambur stag at the range with it, a mere 2 1/2 drams of powder too for both shoulders as recorded in his book of 1860.