Tinker Pearce
New member
.251 TCR (Tinker Centerfire Rimmed) is a straight-walled .25 caliber cartridge designed to fill all the various roles of .22 Rimfires, from gallery loads to exceeding .22 Magnum performance, in a reloadable cartridge with centerfire reliability. It's intended primarily as a recreational/hunting cartridge, but it may also have some utility as a defensive cartridge.
The parent case is .22 Hornet. The finished case-length is .980" with a .275 outside diameter and rim approx. .35" in diameter. The test gun is an Uberti 1973 Black Powder (their C&B version of the SAA for countries where cartridge firearms are difficult to own.) I used some TJ's .25 ACP barrel-liner provided by Magnumwheelman, who also provided the initial .22 Hornet brass to get things rolling. I bored through the cylinder and filled the chambers with 4140 round bar, and after the barrel liner was fitted I line-bored the chambers. I was limited to a 3-1/2" barrel because that's what I could do with the tools on-hand. I'm OK with that because if I can hit my performance benchmarks from this short barrel a longer barreled handgun will only improve things.
At some point I'll fit a modified ejector and housing, but for now I just pull the cylinder and punch the empties out with the cylinder pin. Initially I was testing with 35gr. Gold Dot hollow-points, 50gr. FMC and swaged 38gr. LSWCs. The Gold dots can be driven to up to 1450+ fps. pretty easily, but unfortunately they aren't stabilizing well; at 7 yards I'm getting yawing and even keyholing, and accuracy is not good as a result.
The PPU 50gr. FMC on the other hand are very accurate; of course it wouldn't be me without a flyer...
The 38gr LSWCs are similarly accurate.
So far I've loaded rounds in the .22lr and .22 WMR range, and some that exceed .22WMR from a 3-1/2" barrel. I've used Unique for some of the LR-equivalent loads, but I am mostly focusing on Power Pistol right now, and I'll be experimenting with Red Dot next. Interestingly even the most potent of the Power Pistol loads are not producing the somewhat obnoxious muzzle bast associated with .22 Magnum from short barrels.
I'll be using some .25 caliber airgun pellets, seated deep like a wadcutter, for the gallery/pest loads, but right now I am exploring the mid-to-upper range loads. One of my favorites so far is the 65gr. LSW at 1038 fps. producing 155 ft./lbs., with a standard deviation of only 15 fps.!
Fun project and it seems like a genuinely useful round. My expectation for this round is that I will have a lot of fun playing with it before it vanishes into obscurity, but hey- a fellow has to have a hobby, right? Doesn't stop me from fantasizing about a .251 TCR Ruger Bearcat, or a 7-shot airweight J-frame...
The parent case is .22 Hornet. The finished case-length is .980" with a .275 outside diameter and rim approx. .35" in diameter. The test gun is an Uberti 1973 Black Powder (their C&B version of the SAA for countries where cartridge firearms are difficult to own.) I used some TJ's .25 ACP barrel-liner provided by Magnumwheelman, who also provided the initial .22 Hornet brass to get things rolling. I bored through the cylinder and filled the chambers with 4140 round bar, and after the barrel liner was fitted I line-bored the chambers. I was limited to a 3-1/2" barrel because that's what I could do with the tools on-hand. I'm OK with that because if I can hit my performance benchmarks from this short barrel a longer barreled handgun will only improve things.
At some point I'll fit a modified ejector and housing, but for now I just pull the cylinder and punch the empties out with the cylinder pin. Initially I was testing with 35gr. Gold Dot hollow-points, 50gr. FMC and swaged 38gr. LSWCs. The Gold dots can be driven to up to 1450+ fps. pretty easily, but unfortunately they aren't stabilizing well; at 7 yards I'm getting yawing and even keyholing, and accuracy is not good as a result.
The PPU 50gr. FMC on the other hand are very accurate; of course it wouldn't be me without a flyer...
The 38gr LSWCs are similarly accurate.
So far I've loaded rounds in the .22lr and .22 WMR range, and some that exceed .22WMR from a 3-1/2" barrel. I've used Unique for some of the LR-equivalent loads, but I am mostly focusing on Power Pistol right now, and I'll be experimenting with Red Dot next. Interestingly even the most potent of the Power Pistol loads are not producing the somewhat obnoxious muzzle bast associated with .22 Magnum from short barrels.
I'll be using some .25 caliber airgun pellets, seated deep like a wadcutter, for the gallery/pest loads, but right now I am exploring the mid-to-upper range loads. One of my favorites so far is the 65gr. LSW at 1038 fps. producing 155 ft./lbs., with a standard deviation of only 15 fps.!
Fun project and it seems like a genuinely useful round. My expectation for this round is that I will have a lot of fun playing with it before it vanishes into obscurity, but hey- a fellow has to have a hobby, right? Doesn't stop me from fantasizing about a .251 TCR Ruger Bearcat, or a 7-shot airweight J-frame...