[11B3]

The wall thickness is plenty for 3 ounce charges and bowling balls. Especially if the material is 4140 steel (normally used for howitzer barrels or tank main guns).

If someone around Puget Sound builds one of these and needs a place to fire it, let me know - you can come out to my place. As long as it doesn't fly over a mile, it's safe here. (If nobody else tries this around here, I guess I'll give it a shot so to speak.)

[WorkingClassFilth]

"...a big 'ol hunk o' pipe...half-inch-nominal wall pipe...some sewer pipe..."

I'm not reading anything at all about 4140 steel or ordinance grade materials. The maker had welded the steel plate to the bottom but he was still concerned about inducing brittleness to the metal with further welds.

I'm thinking this guy's a few reloads short of a 'hold muh beer' alert.

[archy]

If someone around Puget Sound builds one of these and needs a place to fire it, let me know - you can come out to my place. As long as it doesn't fly over a mile, it's safe here.

I've not gotten a mile out of mine yet. Next time I'm out your way for a visit or conference, I'll toss one in the back of the truck and warn you I'm headed your way. Till then, *Go here* and drool.

-archy-/-