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November 15, 2011
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I have a new to me DW heavy bbly 4" off of gunbroker, SN 36XXX. I had a 6" 357 DW in the 90's and let it go for something else. The bbl-cyl gap is very tight on this, it will not close on a 0.0015 feeler gauge. I don't yet have a wrench but plan on shooting this for groups before I mess with it anyway. Does anyone see issues with this tight of a gap in hot weather? I see a need for frequent cleaning and watching but the cylinder does not bind on anything. I have not shot it yet and it might be sat at the earliest. Thanks.
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Dans Club
December 4, 2011
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Welcome to the forum. As you shoot the gun its going to get hot and that clearance is going to grow closed and cause binding. Also, it won't take much fouling to build up to cause binding as well. Get a wrench from EWK (see the right hand side bar) he makes the best wrenches for our guns. I'd set the gap to between .004-.006. If you try her in competition as tight as it is, it may let you down.
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Dans Club
March 2, 2008
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That is tighter than I would ever run a gap on any of my guns, and it's important to remember that cylinder faces on many revolvers are not uniformly flat and square. The gap can vary from one chamber to another. One of the reasons that most manufacturers run a .004-.006 gap is so they do not have any binding problems EVER.
Be prepared for that gun to bind up in a heavy shooting session. Heat expansion in the barrel and cylinder will expand both of those parts toward each other, that gap will inevitably shrink.
I'd wait to get the wrench and gap it carefully to no tighter than .002 on the tightest chamber.
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