Anonymous
10/6/2025, 9:49:05 PM
No.64362576
>>64362494
3/8" pipe has an id around .48" so it chambers .410 which is .47" as long as you file out the seam in the pipe. I just used a round file. The bottom barrel is 1/4" schedule 40 iirc, I was buying lots of pipes to try to find one the same spec as some old scrap pipe I had that natively chambered .32. That one I chambered to .38 with sandpaper glued to a rod in a hand drill, then I button rifled it. It's possible to cut chambers like that but finicky and probably too much work for general hobbyists or people who just want to arm themselves, why I was looking for .32 id pipe. For accuracy though ecm is probably the way to go. I just use rifling buttons for legal compliance, I didn't do any math when I made them, just cut them by eye.
Trigger is printed.
3/8" pipe has an id around .48" so it chambers .410 which is .47" as long as you file out the seam in the pipe. I just used a round file. The bottom barrel is 1/4" schedule 40 iirc, I was buying lots of pipes to try to find one the same spec as some old scrap pipe I had that natively chambered .32. That one I chambered to .38 with sandpaper glued to a rod in a hand drill, then I button rifled it. It's possible to cut chambers like that but finicky and probably too much work for general hobbyists or people who just want to arm themselves, why I was looking for .32 id pipe. For accuracy though ecm is probably the way to go. I just use rifling buttons for legal compliance, I didn't do any math when I made them, just cut them by eye.
Trigger is printed.