[WorkingClassFilth]

I'm with you, Boris.

There's good reason breech blocks are forged. Fun toy today, but I'll bet the chamber pressures are far more than the ASTM specs ever imagined for sewer pipe walls needing to contain. One of these days somebodys head will be sailing as far as the bowling balls.

IMO.

[Eaker]

A bowling balls diameter averages 8.6", so if one were to use 10" x 0.500"wt; seamless X-60 pipe you will have a actual bore of 9.75". Weld a cap meeting the same specs on one end and call it good.

Off hand I don't know the yield on said pipe, but it should be sufficient for firing a bowling ball. At a weight of about 55 pounds per linear foot it would be pretty tough to tote around though.

I do agree that sewer pipe is a poor choice.

[gitmo]

My thoughts exactly. The shrapnel from the sewer pipe would be my biggest worry. I've used bamboo (with a smaller charge), but that stuff's not as brittle as a sewer pipe.