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There is a lot of advice and information available on the internet regarding the way projectiles fly high or low when fired into a crosswind. Unfortunately, when it comes to pellets, most of the information is wrong. Here I hope to try to explain why pellets fly high or low in a crosswind and...

One of the things which often gets mentioned is that pellet wobble will affect the BC of a pellet, leading to large differences in measured BCs. I have never been comfortable with this simple and logical conclusion, the reason being that, while pellet wobble will affect BC values, it also...

Some time ago I carried out some work looking at pellet spiralling (https://www.airgunnation.com/threads/pellet-spirals.1297114/) and how it could be reduced at ranges up to 100 yards. The conclusion was that increasing spin damping could reduce spiralling to negligible sizes, but of course as...

Recently I got to thinking about shooting to ranges of 100 yards and the problems with pellet spiralling at the longer ranges, so I thought I would try to have a look at it for a couple of pellet designs. The two pellet designs are JSB pellets, not because they have particularly bad problems...

With all the discussion of lead free pellets, I have had a look at modelling a direct comparison of the group sizes between two pellets, one made of lead and the other made of zinc. I chose the usual 0.22 15.9 grain JSB type pellet and just substituted zinc for the lead. The zinc pellet weight...

This thread was written after discussions on lead free slugs. It contains a lot of information and graphs. For those who do not like graphs and tables, it may be useful to just skip to the end following the final table where I have tried to summarise the results. This is a first look at what...

One thing which affects all shooters, but in particular the air gun shooter, is the effect of a cross wind giving downwind drift. Here I will try to explain in a simple way how downwind drift is produced and how it varies with range and speed so that readers may understand better how their...

This is going to be the most technical of the threads on pellet or slug stability. I am going to try to explain how gyroscopic stability works. It is a relatively simple phenomenon, easy to demonstrate in a 3D environment, but not easy to show on a 2D screen. Some people misunderstand what...

The aerodynamic stability of pellets is a grossly misunderstood subject, mainly it must be said due to misinformation on the internet in videos and articles by "experts". I have previously tried to explain the different types of stability used by pellets. Here I hope to be able to debunk a very...

This has appeared on a few forums, mainly in the UK, so some of you may have seen it before. I have tried to make it as simple and none technical as possible. Quite often you will see someone mentioning stability, talking about how pellets go unstable as they slow down or are more accurate...

Hi there Just joined, hope I can be of help to some of you people on here. Retired now, but for 40 years I worked on projectile flight and aeroballistics of gun projectiles of all kinds, from grenades doing 40m/s up to orbital gun launched rockets. Carried out a lot of work on pellet and slug...