Why there is no many builds in .223

This forum as you might have seen is 90% FX related stuff and 9,9% other brands leaving 0,1% for custom builds. You my friend are on wrong forum if you want to find stuff like that . 

Try Gateway to Airguns

JSAR built some.

Here is a interesting .223 build but it is a Huben - Impact clone and it does full auto

That 223 escape you are talking about is also owned by finnish guy. We also have my spa M10 + 2others with 222rem barrel M10's in Finland. There is also few custom guns and atleast one Drummen Sinner 223 and atleast one condor with 22lr barrel so its fairly popular caliber in here seeing how little we have ppl building these. Generally there is only one manufacturer building this caliber and its Drummen Sinner but its super expensive custom. In USA there is atleast few 223's and you can find them from GTA. There is even topic about that one custom that was build in here and its pretty insane pushing 160+ FPE. 

There are a couple people on the AGN that have a Daystate Air Ranger in .223

and I've seen pictures of a Daystate Wolverine with a .224 barrel on it but I could

not find the pictures when doing a search.



Here is a .224 Huben K1-V1 with a TJ's 28" inch long .224 barrel as you can see

the barrel is longer and the air tube has been extended.



 

I forgot about Beumont. They make a .22/.223 slug shooter.

https://www.facebook.com/pages/category/Outdoor---Sporting-Goods-Company/Beaumont-airguns-522026891960926/

Just a few photo’s regarding my Kral Puncher One 224 cal build.



Barrel is a TJ 1:14 twist sleeved with a OD 16 mm a carbon fibre tube. 



I cast FN and HP slugs, the HP are by far the most accurate and are outstanding for shooting pigeons. I have seen 1020 fps using a 47 gr FN through the chronograph that’s over 100 fpe.





Some typical accuracy photo’s, I recently stiffened the barrel with a OD 20 mm carbon fibre tube over the OD 16 mm tube. Went on a pigeon shoot then lockdown, so I haven’t had a chance to see if there has been an improvement in accuracy.



If feel if the air rifle was regulated it would shoot sub 2” groupings at 225m. So after lockdown I am going to modify my Puncher One as above with a 300 bar Priest bottle and 195 bar human reg. 

Hi Mercado, I initially purchased a 30” Long barrel and then purchased the air rifle. It became apparent that the air rifle with a 30” barrel wouldn’t fit in its gun case, so I decided to reduce the barrel length to 27.3” ( 695 mm). I removed the choke from the barrel as it doesn’t make sense to me to have a choke in a slug shooting air rifle.

Regarding the valve, yes I opened the throat from 4 to 4.5 mm and I filed the two transfer ports. In the photo you will see that I changed the flow direction as it doesn’t make sense to make air turn 90 degrees for no reason.

Mercado:

I see two main reasons why the .223 is not so popular, but there may be many more ...

1. The caste bullets will be too long for feeding into most magazines...

2. Airgun manufacturers are not interested in "Custom Builds", their business is mass production of guns that will use commercially available pellets 

Regarding the Ballistic Coefficient: You mention that a .223 cast would have better BC than a .22 and this is partially true...It will have better BC because it will be longer compared to commercially available slugs/pellets, nevertheless, if you elongate and add mass (weight) to a .22 slug or a pellet to a point where it is as long and as heavy as the cast, the .22 will outperform the .223 or .224 but both bullets will have the inconvenience mentioned in point 1 above..

For shooting 45 gr. in a .223-.224 at 990 ft./sec. you will need a huge regulator pressure, even using one of the new Impacts with Power Plenums, the higher the pressure the more wear of parts, the less shots (less efficient gun) and the less precision...From what I've learned, most of the people participating in this forum put efficiency and precision over energy.

Some 10 years ago I tested some of the best .22 Rimfire barrels that were used in .22 Rimfire BR competitions...Those were all .223's MI Barrels (Note: MI means minimally invasive) and I opted for slow twists (1: 24 and 1:28 TR's) and 3 & 5 land/groove combinations...I didn't obtain any big energy advantage over a lighter .22 pellet shot at a much higher velocity so the energy levels would be comparable...We then tested a .172 barrel with commercially available 20 gr. Sierra bullets that have a .125 BC, the project was very attractive but the cooper jacket generated much friction that turned into low velocities and we immediately aborted any further research, it may work with a custom slightly over sized barrel but we lost interest in pursuing this project. Other than experimenting and learning I don't see any justifiable reason for setting up an airgun with a powder burning barrels/bullets given the commercially available slugs and excellent pellets.

If we are realistic with the capabilities of the gun we are using, a .22 slug will give us enough energy for varmint shooting up to a coyote size animal maybe up to around 80-100 yards or maybe a little further if we do our part..A .30 will be better and if you get into the .45's and .50's you will find people shooting Cape Buffaloes with those calibers...We've shot some wild boar in TX with a .30, but boars are extremely tough and hard to kill (body shots) but no so much if you shoot them in the head...

There are many slug molds out there with commercial airgun pellet diameters (.177, .22, .30, .35, .45 and .50), I've seen cast molds that are OK but the best are of course are the swagged slugs. With swagging molds you can make them hollow point with flat base, dish base and even hollow base like a pellet (FX Hybrids) and you can also have a full hollow body that will allow with any of the bases mentioned that will allow lower weights with high BC's...Not cheap but if you are an enthusiast and have the resources this is in my opinion the way to go.

Best regards,

AZ 

Well I generally disagree with everything you just said.. You can get 41,4gr RWS bullets comercially and really cheap but with those you are prettymuch running with air powered 22lr. With faster twist you can also cast and get some really high BC slugs. My SPA M10 for example is only pushing out 110fpe therefore you can get more powerful 22lr ammo but at the sametime my SPA is doing that with bullet that holds significatly higher BC than any 22lr ammo so its actually carrying alot more energy at 100m and furter than any 22lr and so its actually usable in longer distances and since it dose not go past supersonic - > transonic - > subsonic phases it holds accuracy heck alot better not to even mention how much smaller ES you can get with air compared to 22LR.

There is only one thing I agree with you and that is that there is generally no real reason for any mass producer trying to make one and I think its bloody good. I like to keep these outside of legistlation. 

From right to left 41,4gr RWS, 51gr spitzer and 61gr'r.