3 ms·

A hydraulic piston, which can be a hand powered jack, and a rifling button makes it possible to easily rifle most any metal pipe. Plus in 99% of shootings the

A hydraulic piston, which can be a hand powered jack, and a rifling button makes it possible to easily rifle most any metal pipe. Plus in 99% of shootings the targets are fairly short range where rifling isnt even very important.

Ancapistani 4y ago
> A hydraulic piston, which can be a hand powered jack, and a rifling button makes it possible to easily rifle most any metal pipe. That's not my experience at all. You have to have a means of rotating the button rifling tool consistently as it is pulled through the bore - for an m1911, probably the most common .45 ACP pistol, that's 1 revolution per 16" of barrel. Because it will take multiple passes to cut the rifling, you'll also need a way to index the tool for each pass. > Plus in 99% of shootings the targets are fairly short range where rifling isnt even very important. If you're making a gun to shoot someone, that makes sense. The far more typical case is that you're making it because you are interested in making a gun, and rifling is a requirement in the US to comply with federal law for a pistol[1]. 1: The term "pistol" is legislatively defined, but broadly speaking it's anything designed to be fired with one hand and <26" in overall length.
- jacquesm 4y ago
  Unless you're going for sniper level accuracy a barrel can be rifled with just the button because the die will cause its own rotation as you push it down the barrel, this is because of the trailing part of the button. The reason rifling machines do it is to ensure minimal wear on the die, and for speed of operation but that's an optimization more than a requirement. This is also the reason why the cutters on a typical button are as long as they are: to ensure that it rotates. You also don't need to index it for the same reason: the tool will seek the grooves made by the previous pass (except for point cutters). It's basically just a very coarse inside thread cutter, where the thread is so steep that it will drive the tool to rotate much as the bullet will rotate when passing through. This will work with any thread that is more than 1:1.

Ancapistani 4y ago

> A hydraulic piston, which can be a hand powered jack, and a rifling button makes it possible to easily rifle most any metal pipe. That's not my experience at all. You have to have a means of rotating the button rifling tool consistently as it is pulled through the bore - for an m1911, probably the most common .45 ACP pistol, that's 1 revolution per 16" of barrel. Because it will take multiple passes to cut the rifling, you'll also need a way to index the tool for each pass. > Plus in 99% of shootings the targets are fairly short range where rifling isnt even very important. If you're making a gun to shoot someone, that makes sense. The far more typical case is that you're making it because you are interested in making a gun, and rifling is a requirement in the US to comply with federal law for a pistol[1]. 1: The term "pistol" is legislatively defined, but broadly speaking it's anything designed to be fired with one hand and <26" in overall length.

jacquesm 4y ago
Unless you're going for sniper level accuracy a barrel can be rifled with just the button because the die will cause its own rotation as you push it down the barrel, this is because of the trailing part of the button. The reason rifling machines do it is to ensure minimal wear on the die, and for speed of operation but that's an optimization more than a requirement. This is also the reason why the cutters on a typical button are as long as they are: to ensure that it rotates. You also don't need to index it for the same reason: the tool will seek the grooves made by the previous pass (except for point cutters). It's basically just a very coarse inside thread cutter, where the thread is so steep that it will drive the tool to rotate much as the bullet will rotate when passing through. This will work with any thread that is more than 1:1.