Recent content by Ballisticboy

These are the lightest I have seen. https://www.daileisure.co.uk/kvintor-blik-flash-bang-pellets-177 I measured the BC for them years ago, it came out as .0025. They made a nice bang if you managed to hit what you were aiming at.

Well, that is 27 minutes of my life I won't get back. To be fair, what they say at the start is correct, spinning a rugby ball (American football) is no different to spinning a bullet/slug, so the same principles apply. The same cannot be said for pellets, as they use a combination of spin and...

Basically, it is down to how much the air is disturbed. Pellets have a more complex shape than slugs, involving the air getting around more changes in direction, so you would expect them to generally be more noisy. However, hollow points are going to generate some noise, so large hollow point...

No they are not, please read this. https://www.airgunnation.com/threads/aerodynamic-stability-of-pellets.1276895/

The centre of drag, like the centre of gravity, for the pellet lies on the pellet centreline, with no particular longitudinal point of acting. The centre of pressure, which is completely different, lies behind the centre of gravity and thus produces stabilizing moments about the centre of...

Slugs do not get more stable as speed increases. In fact, like most spin stabilized projectiles, at subsonic speeds the faster they are fired the less stable they get. Depending on the stability factor of the slug, having less stability may reduce group sizes, but there are plenty of other...

A rebated boat tail is claimed to improve the intermediate ballistics, thus reducing group sizes compared to a straight non rebated boat tail. The main problem with rebates is that they increase the effective boat tail angle, which is already excessive on many slug designs, making it difficult...

Simples. Because I read it on this one first. :)

Approximately 11.7 degrees outside, about 12.1 degrees internally.

Some of the reasons lead free pellets give larger group sizes were discussed here. https://www.airgunnation.com/threads/lead-and-lead-free-pellets.1283547/

Not really semantics, differentiating between the two is very important if you want to understand what is happening. As for the 100 yard groups in any weather conditions, to try to ascribe the differences in group sizes to BC alone is pure folly and is ignoring the most important basic...

You are talking about accuracy, where BC will have an effect. I was talking about group size, or precision in US nomenclature, which is not the same thing as Bryan Litz explains in his book.

Unless you are shooting on a windy day with the wind varying a lot, BC will not help your group sizes, that is much more complex.

Both MERO and the original Chairgun will give maximum ranges.

GA is not a suitable drag function for slugs, particularly at speeds approaching 1000 ft/sec. The BC quoted by FX may well be based on the G1 drag law again not suitable for slugs giving artificially high values at higher speeds, good for sales, not good for trajectory modelling. RA4 is better...