That is still WAY more than a 22LR round, which is what the thread was asking about.WHAT ABOUT A .222 REM. Smaller case than a 223 but a faster round
Oh. The OP said hunting in PA and cant use anything larger than a .23 cal Why not re-load a 22lr? The same basic loaing you just need to get Nitroglycerin, lead styphnate, antimony sulfide, barium nitrate. Might be more trouble than its worth. I'. sure you probably need a special permit for a couple of those chemicals.That is still WAY more than a 22LR round, which is what the thread was asking about.
I didn't cast bullet's? read all of this so maybe missed it. How about something like either a 218 Bee or a K-Hornet either with cast bullet's? I seldom use my 22 rimfire any more but use my 22 mag RF a bit. have thought for a long time I could easily match it with a Bee or a Hornet. Then thought the K-Hornet to get a better shoulder on the Hornet case. Probably won't do it as I don hunt small game a lot and don't even own a 22 CF anymore.I believe you have gone off on a "dead End spur" or Tangent to the basic Thread as posed by the OP in that the OP is looking for a RELOADABLE cartridge NEAR to the size power range of a .22 Long Rifle RF or .22 WMR cartridge. He has stated it may NOT be greater than .230" Caliber, although it is not stated whether this is a limit on the Bore or Groove diameter.
In the past there were Rimfire primed cases available for retail sale within the USA and Hand Loaders did add there own powder and bullets to these primed cases.
I presently have an old "Hollywood Gun Shop" (Hollywood Engineering) Threaded "H" design shell holder that is cut to fit .22 Rimfire case and rim Very Nicely. So I presume reloading tools Were available commercially
I have read of persons shooting Silhouette competitions with hand loaded Rimfires.
Have I done it myself? No.
I also think it would be Possible to make CF Cartridges in .22 RF sizes or some of the older .22 RF case sizes that were produced prior to WW2.
Careful machining could produce a .22 CF case that would take a Small size primer (power to be determined) to take a nominal .224 diameter bullet and a powder charge to send it down range somewhere between Subsonic and supersonic velocity without pushing chamber pressures over the present SAMMI .22 RF pressure limits.
It has been done in the past.
For light loads or loads that more or less duplicate .22 Rim Fires; I use my .22 Hornet rifle. Using 7.0 grains of SR-4759 and a High velocity 50 grain bullet loaded-up into Remington Hornet brass; this load is accurate and a fine non-destructive load to use on Squirrels. Also, one can use regular "Hornet" bullets of 40 - 45 grain with 4.0 - 4.5 grains of Unique with I've also found accurate and non-destructive. I used both loads when I lived in Indiana, however: Center Fire ammunition is prohibited for use on Squirrels here in Kentucky.I've loaded up .223 cases using 40gr Hornet bullets and Blue Dot, for a 1200fps load. They aren't as accurate as I would have liked, but they mimic bulk .22 ammo for the most part. If you're going for a factory .22lr velocity, you really don't have much room to work to tailor the load. So, your rifle either shoots it good enough to suit your purpose or it don't.
What did you do about the of centre firing pin ,did you make a new barrel?I made some center fire 22LR cartridges from 25 ACP brass. It was during the great 22 shortage and I have a TC Contender in 22 LR so I made the cases and fired them in the contender.
It took making 2 forming dies and a full length sizing die, decapping pin, primer seating pin and I bought a mould for healed bullets that I designed that weight 42 grains cast from pure lead. I made a case crimper and case belling tool to complete the reloading tools. I had to cut the rim to specs on the lathe and then carefully trim the case to .225" up from the rim to thin the wall so it could be swaged down. I cut a small relief just above the trimmed rim for clearance to the chamber. I mickey moused a scale attachment to accurately measure .5 to 1.5 grains of powder using a 15 inch tube in place of the scale pan so I could use the scale at 5 grains to equal .5 grains on the beam.
The modified case would hold over 1 grain of HP38 so I started at .5 and worked up to 1 grain where I reached 1150 fps from my 10" Contender barrel. They were accurate compared to rim fire cases from the same gun and very close in velocity.
This was nothing more than an exercise in futility because while you could call them a 22LR they were still center fire cartridges. They were reloadable but casting pure lead 22 caliber bullets was work. It was rewarding to find it could be done but not really practical.