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I adjust my speed in the kestrel to match the real bullet flight out to 200 yards regardless of what my chronograph says. I just use the chrono to identify flyers/ES outliers while im getting dope. After 200 I adjust the AB 'drop scale factor' in the kestrel. G1 also works well but i really like how easy the DSF feature makes it to get a good dope card. Loved the video thank you for the lesson.

I believe your skills/ knowledge may have stumbled upon a hobby that you will find people have great interest in learning more about. Good luck and i hope this ends up being worth your time!

Excellent presentation

You might find the black powder cartridge shooter's bullets interesting. 45-70 being the starting point. 500 grain, 1350 fps. Transsonic is the major part of the ballistic zone. Hundreds of bullet shapes: roundnose, creedmore, postel, money, flatnose, to name a few. Range out beyond 1000 yard shooting matches. Look at "Black Powder Cartridge News" magazine, also "Down Range Data" by William T. Falin Jr.

Physics is Fun Thanks for the great presentation!

thanks for sharing, it's a great video about rimfire shooting. Hope for more great videos like this one in the future.

Great video

Love this! 22lr🤌

after watching this i looked more into G1 vs G7 and you are right G1 just does not make sense for anything it seems. G7 is a better model. It must be advertising driven because G1 is a bigger number. Thanks for opening my eyes!!!!

I see you're using Eley bullets. I wanted to try them, but they don't even bother putting the FPS on their packages. Only way to know what their FPS is, is to look them up online. CCI put their FPS on the box. Yes, the weight & design of the projectile is relevant, but since I have to know whether I'm shooting subsonic or not, only ammo that clearly displays the FPS on their packaging is getting my money. If they have room for goofy names, they have room for that. For those at Eley that care, the unhelpful packaging is affecting sales - especially when you're buying from a clerk that knows nothing about them.

Great video!

Great video. Fascinating info presented professionally. I hope that as 22 cal precision shooting becomes more popular, we will see some major steps forward in bullet design.

Having that music playing while you talk is really annoying. I really wanted to watch, but can't take almost 20 minutes of that.

Good video but one thing you didn't take into account is as the bullet travels down the barrel it also get shrunk by the rifling in the barrel and it changes the shape the projectile

Great vid mate!

As a pilot... i appreciate the applied aerodynamics on the bullet shape

No. RANS is proven to give results very much in error for blunt-based bodies. A little knowledge is dangerous.

So...are these taken from dimensions of unfired lead? How do you know what the bullet shape and dimensions are like after firing?...

Thank you for the excellent, informative video.

Does the modeling software take spin into account?

James, if you recover a fired .22 LR bullet from a deep water tank, the base is bulged out to meet the barrel groove diameter, by means of sudden application of high pressure gas ahead of the chamber. So, the bullet base "in flight" does not look like it does, before firing. Certainly, full depth land impressions can be observed almost all the way to the rear of a fired .22 LR bullet. If Eley are attempting to mimic a boat tail bullet shape after firing, the rifling spin requirements for stable flight will exceed the typical 1:16 for a .22 LR barrel.

Very well done... and the best thing, besides seeing that the bullet shapes are already optimized, was seeing that the increase in the barrel reduced the speed of the bullet, making the 16" long one better ... ! 😮❤

The heel obturates and fills the bore entirely once fired, we recovered several after I broke my last record with them at 1325 yards.

I am using Lapua because of the proximity of their test facility. Their bullet is a bit more pointed.

Dear sir: the stupid music only detracts from your material. I couldn’t watch very long.

Thank you.

very interesting and great and understandable explained 🙂

TOP !!

An Excellent presentation - very informative. Have you verified the uncertainties affecting your chrono measurement. From a metrological perspective, your measured results cannot be precise. There must be uncertainties associated with measurement taken alone (let alone the total uncertainties at the measurement instant form all sources.) eg environmental, cartridge related, rifle related.

I think this is the video that was mentioned previously . Im sure everyone will love this video! Thanks for the recommendation ruclips.net/video/BPwdlEgLn5Q/видео.htmlsi=ANSbgmqTHcFIIXgH

Part 2? Anything missing that you want to add ?? Really enjoyed this video! Thanks!

Very interesting video Mr. Conger please make more on other calibers!

I found your discussion of comparing modelled results to single data point physical results very interesting. That is quite similar to the way naval architects design ship hulls (my profession for a number of years). We couldn't afford to run models of all the proposed designs down the tow tank, so we used a combination of the results from a standard design series (some of which are very old), and a single design we felt was in the ballpark, as the basis for making small tweaks here are there in the shape of the hull.

laminar flow is a thing.. who knew..

The upper bullets are pulled directly from the unfired cartridges. Note the shape of the drive bands and crimp line. The lower bullets are recovered 22lr projectiles of the same type. Swaging and obturation move the lead to fill the bore and create the needed seal. lh3.googleusercontent.com/pw/ACtC-3f8bNE2HBzhJbHY-NcLKFH0qmOHUdz3yrHTUCcWybZJk1SzZIWEOIqwrGzqj86XGzwqHhYWrMOwSLrXe6yhg-71eV0mp5wkFaYrpJKkwF06ZK_yDdhw8s1DKh4Kzbaj-3CW1SzqvGVDmlGJNU5i3VAF=w595-h356-no?authuser=0

You should verify the shape/profile of a fired 22lr bullet. The obturation of the heel and swaging by the leade changes the shape from the heeled projectile you show, to a round nose cylinder, with no diameter change at what used to be the crimp line. Bullets recovered from a snowbank, water tank, poly-fil trap all show the crimp line and smaller diameter heel have been reshaped to a uniform diameter from the leading edge of the drive bands to the cupped heel.

Lovely stuff. Thanks for sharing. 🖖

A lot of .22 air rifles are shooting just before that transonic area you referenced. I have several that shoot around 650 to 700 feet per second. It would be very interesting to see a similar video testing out various shapes and weights of pellets for .22 air rifles.

The reduced diameter heel at the back somewhat mimics back diameter reduction in Spitzer bullets, which are low drag. As of flattish nose, that is counter intuitive, BUT General Purpose bombs used by Russians lately have *flat* noses, or look literally semiwadcutter. Contrary to all other bombs which try to be aerodynamic. Not sure why, maybe free fall trajectory is more predictable

As someone who builds pcps as a hobby this video is absolute gold. Thanks for making this.

That P47 doesn't have a blunt nose, it has a great big gaping hole for the air to pass through and cool the engine.

Quite interesting, thanks.

Great video. Clears up a lot of questions.

Great vid - looking forward to more like this.

Nice presentation. I would also like to see the vorticity maps and correlate them to the drag. Thank you!

Boeing 747 max cruise speed was mach .82. fastest commercial cruise speed on non supersonic airliner.

Loose the background music very annoying in the beginning...

Good stuff. I know that you are focusing on long-range target ammo, but I would love to see some basic comparisons with more standard 22 LR bullet profiles like Stingers or Punch. Ubuntu user. I'll checkout Freecad. Thanks

Eley match are over priced and not very good

Thanks Very technical but you explain well enough to follow.