With my BSA meteor which shoot the same groups with wad cutters and round nose pellets I have found that at 10m there is no difference in the group size and at 40m groups at the same place with 7.5 cm bullet drop (that is on average) The pellets that I have used is Dynamit Nobel wad cutter(7.3 grain) and Accupell round nose (7.9 grain).
Now an interesting read from http://en.wikipedia.org/wiki/Ballistic_coefficient and http://en.wikipedia.org/wiki/Externa...cs#Pejsa_model
I need to do more field testing.
In my opinion I must just for get all the BC etc. and just practice more and just shoot my little BSA more accurate with the peep sights.