I have seen a tool to make a hollow point in a .22lr bullet. I have not heard of an accurizer. Someone probably made one, but I don't see it as necessary or effective. My old model Single Six Convertible is very accurate with long rifle ammo.
Thanks once again for another very thorough explanation!I have one of the original Paco Kelly Accurizer tools. It does one cartridge at a time versus 3 or 4 with the later models. Does it work? Yes, it does but I'm not sure it is worth the time needed to reshape the bullets. There is also a downside with the Paco Kelly tool and that is ... the nose of the bullets is reshaped, which makes the ballistic coefficient of 22 LR bullets even lower. This affects energy at longer distances because the bullet slows down faster than a factory shaped bullet. So .... slightly improved accuracy, slightly reduced terminal energy.
Just a note that some people may not know. Virtually all revolver cylinders have .225" throats. 22 LRs develop about 20k psi chamber pressure so just the pressure alone will cause the bullet to expand (obturate) enough to get a decent seal in the slightly larger bore of a Single-Six. So in reality, chamber pressure does about the same thing as the Paco Kelly tool. No doubt, the Accurizer bullets get a tighter seal in the bore but they only make a token difference in accuracy improvement when used in a Single-Six with a .224" bore.
I tried using my Accurizer tool for my S&W Mod 17. It has .225" throats but with a .222" bore. The results were terrible ... a badly lead fouled barrel and poor accuracy.
I have an old Winchester Mod 1906 that was made in 1912. The bore is worn and the rifling is very thin from the countess rounds fired in the last 111years. I use the Paco Kelly tool to expand bullets for this gun and the accuracy difference is like night and day.
Here's my old Winchester: