Thread: A tricky problem resolved

Originally Posted by No.3

Can actually bulge the tube with that - someone I know tried it. Luckily not a really expensive job, and the bulge was near the muzzle where the wall thickness was not flash. Ended up having to tap the object back a wee bit and it loosened up a heap once it started moving (wasn't going forwards). A squib load.

Yes have seen a few bores (funny enough many in 22) bulged by an obstruction, squib load, oil in bore etc.. I doubt you could have bulged this barrel with the process, the round chamber pressure is 60,000 PSI (be it depleting as it gets further down the bore), the grease gun can only produce a little over 3,000 PSI