Quote Originally Posted by ballisticboy View Post
There is absolutely no reason at all why the friction drag on a properly designed airgun slug will be any higher than it is for a pellet in a barrel. They will both have the same bearing surface material and bearing area so friction is a none issue.
Chairgun is a useful tool for initial settings on a gun but it is not, and never has been intended to be, a scientific tool for projectile design and comparison. If you want to do that you need a far more complex model than Chairgun has ever been along with input data which is simply not available to most shooters. A properly designed slug, the same weight and muzzle velocity as a pellet, will have a flatter trajectory than the pellet, not more curved, due to the lower drag. If you want to keep the same POA then the slug would have to have the same brick like aerodynamics as a pellet so there would be no point in having them.
You need to try not to generalise based on poorly engineered previous efforts and YouTube heroes. What I am saying is based not just on theory and modelling but on practical experimental experience from 30 years ago.
However I will say that what I have seen of the big pellet makers attempts so far at designing slugs have appeared little better than the amateur designs.
The Nielsen slugs only contact barrel on the rear third of the slug. These pellets are far superior than the rabbit magnum, piledriver etc