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Because the pressures have dropped by the time the projectile has arrived there...but the things was, they turned them down all the way back. At the very breech. Just to see how much they would...

Exactly...if you refer to(I think it's Hatcher's notebook) about the 1903 experiments at RIA where they turned the barrels down to paper thin trying to get one to pop. Pictures are included in the...

It's NOT a weak point. There's NO danger, just a technical thing. I was speaking about cosmetics and would do those things. Peter is speaking from the engineering viewpoint, not as it's a danger. ...

Yes, I'd also agree with the engineering theory here. I'd have blinded a pin off in there, cleaned it off so the hole would be gone and a screw in the other hole cut and made flush too. Cold blue...

Agreed. Cross pins are a common enough way to hole a sight on and doesn't affect the strength of the steel.