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I looked to see if there was anything available in the UK, I could not believe the prices being asked. o_OMade me wonder how much my hardback signed copy would be worth, though I am not going to sell it.

I don't know where Airgun Depot got those figures from, but in the UK, 3FPE has been shown as plenty to kill a rabbit with a headshot with no run off. The key skill here is the stalking of the prey into a range at which you can be confident of an instant kill. To us, that is the difference...

First, pellets have never been drag stabilized. I tried to explain the aerodynamic stability of pellets in this thread. https://www.airgunnation.com/threads/aerodynamic-stability-of-pellets.1276895/ As for pellet speed for best group sizes, it will depend on how well the pellet is launched by...

In the UK people take squirrels, rabbits, rats, pigeons and other birds around crow size which they are permitted to shoot. Some also shoot pheasants and other game birds when the opportunity arrives. All try to make them headshots at 30 yards or less, though for some who consider themselves...

I was wondering what it was I wouldn't agree with, as on my laptop all your headings are invisible!! I only managed to see it when I selected it and all the headings suddenly became visible. If you're going to use BC's then you may as well use multiple BC's as they will never entirely match the...

According to Bob Sterne's work using my slug drag law, slugs are better at higher speeds than pellets, around 1050 ft/sec for the lowest downwind drift. That assumes they are still stable. Because of their shape, the Altaros slugs may prefer slower speeds if their stability gets marginal as the...

I have analysed the pellets from the pictures and measurements given in this thread and roughly tried to model them. The first thing which came out was that this pellet appears to be aerodynamically unstable, not stable like most pellets. This is due to the very shallow base cavity moving the...

I have only just acquired a LabRadar and have not had a chance to test it very much, but I have analysed a lot of data from Bob Sterne and others over the years. I have also analysed data from large Doppler tracking radars which use narrow beams and moving heads, as well as much more powerful...

There is a system called flight follower which can take film of bullets in flight showing yaw behaviour which should be able to do it for pellets, if you have the odd £25000 to hire it.

There is only one definition of ballistic coefficient, and I have told you what is used in all calculations. I have also pointed out a fundamental mistake in your assumption that a yawing projectile has a bigger reference area with pressures acting on it. As I said, cross-sectional area is not...

First of all, forget most of the things Wikipedia tells you about external ballistics. BC is based on sectional density and form factor. Sectional density is defined as mass in pounds divided by projectile calibre in inches squared, so the projectile area does not come into it. The drag...

Anything can effect yaw, or AoA, particularly when I'm shooting. :(

Since the radar can only detect out to fairly short ranges, the trajectory curvature is minimal, so the angles of the trajectory are very small and likely to make minimal contribution to the pellet deceleration. Similarly, the angles between the trajectory and the radar beam should also be very...

For pellets, yes you should not use G1, particularly at higher speeds, but the comparisons from shot to shot will be much the same unless the muzzle velocities are varying a lot. Chairgun will give you the GA BC, whereas MERO will allow you to choose GA, or GA2 with its modified high speed values.

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...

Pellet yaw angles have to be very small, less than one degree, otherwise group sizes grow to be enormous. Since yaw induced drag is a function of the square of the yaw angle, small yaw angles produce minute increases in drag. I produced a thread on this subject, but never posted it on here. I...

No, the ones I am thinking of were for military purposes, and they were true fully hollow projectiles (with obviously something to block the hole in the barrel). The problem in the wind was related to the stability, not the weight. Yes you can use a small deep hollow point, but you will have to...

I think you mean Humidity, not Humudity. ;)

All high spin rate projectiles, no matter if they are pellets or slugs, spiral when they leave the barrel. Usually the spirals will be very small so you will not notice them. If you have a perfect pellet/slug fired from a perfect barrel held by a perfect shooter, the spirals will be minute but...

Even if you drilled it right through to come out of the base, the best you can hope for is that it will stay in the same place. The other problem you have is that the moments of inertia will be changed with very deep hollows, making the projectile more like some of the cylindrical projectiles...