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July 10, 2011
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So I had fallen in love with my friends super mag and he has owned several. So I purchased one of these fine revolvers from him. Its a beautiful Norwich 445 with two compensated barrels. I have a 8 and 3 inch barrels. I have been shooting reloads successfully up until this last week. Hornady XTP 240 grain 4227 powder 30.8 wt. This last week during a shooting session it started blowing the shroud nut off the barrel. I was using the 8 inch barrel and have done so successfully before with no issues using either barrel. Not sure what the problem could be. I went out with a clean barrel, no build up on the venting. Properly installed barrel using gauge. Had it double checked by my friend who has owned many 445 Supermags. I am new to reloading so I am using reloads done by someone with experience doing so. Rounds thru another 445 without the compensated barrel had no issues of course. Could it be a reloading issue? barrel installation issue ? Sorry for long winded post.
Chris
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Dans Club
March 27, 2009
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Not a clue on this one dang sounds like a thread problem! These have the recessed Nut? I would try a new nut, when she blows does the shroud fall off?
Put some pics of up!
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Dans Club
February 22, 2009
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Just may be a tightening issue...maybe try some teflon tape? At least it's not the barrel nut!
Ron
Technically, the glass is always full; half liquid, half air....
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Dans Club
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November 17, 2008
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First 
to the 
. Sounds like the threads on the nut and shroud must be stripped. Is there any evidence of the bullet striking the nut as it passes through? I think it would leave a mark if it did. Hopefully it will be something simpler. Keep us informed and good luck.
LB
Wisdom is merely the realization of how little one knows, therefore I am wise.
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Range Officers
May 2, 2009
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Just to clarify--he is talking about the "cap nut" on the end of the comp shroud, not the barrel tightening nut.
I suppose the pressure from a round going off could have stripped off the threads if the nut was loose before the round went off. Lots of gas/flame/pressure that has to go somewhere.
SHOOT
July 10, 2011
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Thanks for the welcome. I tried two nuts and same results. Put about fifty rounds thru before with no issues. Bad news is the area we were shooting made it impossible to recover the shroud nuts. How tight should it be. I would assume more than hand tight. I figure the threads on the nut are softer than the shroud for just such a instance. Sounds like one thing for sure is a non vented barrel in my future. I want to shoot some heavier rounds but don't think that's and option with these barrels.
Chris
May 3, 2011
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Congrats on that 445! And welcome to the forum. I would change ammo if you are still using those reloads. Check the primers to see if there is any damage to them. I'm wondering if the reloads are to hot. It may just be a thread problem as mentioned. Good luck!
Range Officer
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Dans Club
February 28, 2009
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Welcome to the DWF. Is it possible that the barrel itself is damaged causing the bullet to be upset and thereby hitting the shroud nut and popping it off?
That would not be good, but it could be possible.
I hope you find the solution and that it's a simple one.
-Mike
February 11, 2010
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+1 what Mike said, I'd check the barrel crown for any damage, that
might "hook" the bullet when it leaves the barrel. Hows the threads
on the shoud after loosing two comp nuts ?
-Blacktop
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January 24, 2009
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SHOOTIST357 said:
Just to clarify--he is talking about the "cap nut" on the end of the comp shroud, not the barrel tightening nut.
I agree, and we need clarification on this. A comp shroud used TWO nuts...one inner one to hold the barrel/shroud together & an outer one to make the comp work. I would guess that it's merely the outer comp nut that has the issue.
A .445 compensated barrel assembly is pictured below...
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