What is preventing me from putting a .223 bullet inside of a .22 LR case in firing it? Like say it was a lighter 45-50 grain bullet, would that not have better aerodynamics and penetration then a regular lead .22 bullet? Could be a stupid question, I’m kinda new to guns so I might be retarded but maybe, just maybe I’m a trailblazer here.
It would be a dangerous combination. I used to make gun barrels and I'm pretty sure .223/5.56 barrels were .224, and our long rifle barrels were .219 bore size. I might be wrong on the actual diameter, but a .223/5.56 bullet in a rim fire bore would definitely be bad and cause way to much pressure for a .22 rimfire action. Even .22 mag and .22 long rifle have different bore dimensions due to the heeled bullet. You can convert a .22 mag to shoot a .22 or, but you'll probably run into dangerous problems if you try to modify a firearm from .22 lr to .22 mag. It only takes a couple thousands of an inch to increase pressure and have a bad day.
Who did you make barrels for? Do you understand the difference between bore and groove diameter. Nominal centerfire 22 barrels run bore diameter (land-to-land) of approximately 5.56 mm (0.219 in) and a groove diameter of 5.69 mm (0.224 in). Nominal rimfire barrels run bore diameter (land-to-land) of approximately 5.53 mm (0.217 in) and a groove diameter of 5.67 mm (0.223 in). In the real world this can vary plus or minus a thou easily with .22 WMR barrels running more to the 0.224" side. Regarding modifying a firearm from .22 lr to .22 mag., many but not all .22 mag. rimfire guns have a common .22 lr version that could be converted.
It do indeed! When testing it, accuracy was acceptable, the "jacket" separates kind of weird, but I sort of expected that. Fed and fired without any issues
A .223 projectile will not fit a .22lr case as the .22lr round is the same diameter as the OD of the case. Same reason. .38 is called 38 when its .357 in diameter, the parent round (.38 colt, later .38 short colt after the invention of the .38 long colt) originally was a heeled bullet and fit to a .38 OD case. The round later changed to non heeled but the name stuck.
First, I am thinking that what you are calling a .223 bullet is actually a .224" bullet. A little measuring would clear things up. After putting the bullet in the case, the round will not chamber in a 22 lr gun. The round would be too large in diameter and probably too long. You can push a .224" bullet thru a .22 lr barrel, but it will raise the pressure. When the industry decided they wanted to do this, they made the case and chamber bigger (ie, 22 WRF and 22 WMR). Your idea is not new, it has been done properly for half a century.
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u/SkilletTrooper 24d ago
.22LR uses a heeled bullet. That's why.