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AR15.COM
8/30/2013 5:51:06 PM EDT
So I just go in my sweet 7 shot SL variiant speed loaders and it was not as easy to get the cases into the chambers as I imagined.  The case mouths were all hitting the edge of the chambers at the same time.  I guess this is why the snub training guy recommends chamfering them.  

Is there a particular tool for this or should one just get any tapered reamer or what?  The cylinder in question is titanium, though I should do my steel cylindered J frame too I guess.  

Thx
8/30/2013 6:23:39 PM EDT
[#1]
Use a ball grindstone of the appropiate size in a Dremel tool or 1/4" drill at slow speed to just slightly bevel the chamber mouths , you just want to knock off the sharp edge.
8/30/2013 8:02:18 PM EDT
[#2]
If it's a .357, you only want to chamfer the cylinder itself, NOT the extractor star. A lot of home "gunsmiths" chamfer everything, but with the higher pressure of the magnum round, cases that fire form to the chamber can cause the extractor to slip over the case rim.
8/31/2013 11:41:00 AM EDT
[#3]
Brownell's sell a special cutter with pilot to countersink chambers.
As above REMOVE THE EJECTOR.  Even on calibers other than .357 the cutter can cut and ruin the ratchets.

http://www.brownells.com/search/index.htm?k=cylinder+chamfering&ksubmit=y

Expensive, but then again it won't ruin an even more expensive cylinder.

8/31/2013 6:34:51 PM EDT
[#4]
Quote History
Quoted:
If it's a .357, you only want to chamfer the cylinder itself, NOT the extractor star. A lot of home "gunsmiths" chamfer everything, but with the higher pressure of the magnum round, cases that fire form to the chamber can cause the extractor to slip over the case rim.
View Quote


thx