Author Topic: Question about setting head space on model 15-2  (Read 621 times)

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Offline danwessonfan

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Question about setting head space on model 15-2
« on: February 08, 2007, 05:07:02 PM »
Hi everyone, I've had this gun for over 20 years and have shot it a lot, but haven't done any shooting for several years.  That's fixin to change!  Blue 8" heavy (non-ribbed) with Pachmyr Presentation grip.  Needless to say it is my favorite gun and the most accurate handgun I've ever shot.  Sweetest trigger too.  I just got the tool set and a new ejector rod, and while studying the cylinder-to-barrel spacing I noticed that the cylinder will move back when I push it by depressing a spring detent in the back of the frame.  When setting the barrel, I assume it's set with the cylinder in it's relaxed position?  I read that .006 is the max spacing, but the cylinder is not perfectly square in the frame so I thought .002 - .003 on the tightest cylinder would allow for expansion and keep the loosest cylinder within the .006 spec.  I would appreciate input from someone who knows more about the guns than I do, all I've ever done is shot it and I want to dial it in before I start shooting it again.

Offline RollTide

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Re: Question about setting head space on model 15-2
« Reply #1 on: February 09, 2007, 07:24:23 PM »
In 357 .003 or .006 in not going to make a lot of difference.  Just make sure that if there is any end shake in the cylinder that the cylinder does not bind on the forcing cone at any place in the rotation.  If there is a lot of play in the cylinder, I would consider sending it back to DW.  If it is just a couple thousandths of an inch, i would just set the gap a little wider and forget it.

Roll TIde

Offline blhof

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Re: Question about setting head space on model 15-2
« Reply #2 on: February 11, 2007, 01:59:20 AM »
.003 would be the smallest on the closest cylinder,  using jacketed bullets.  With cast; the buildup on the cylinder will cause binding after 60 or so rounds.  .005 would be best for cast.