cyburg Posted January 27, 2010 Share Posted January 27, 2010 I am interested in what your magazines feed lips are tuned to. I just bought a bunch of new tubes, limcat base pads and grams springs and followers. Link to comment Share on other sites More sharing options...
Chris Keen Posted January 27, 2010 Share Posted January 27, 2010 Shooters connection has a DVD that explains everything. http://shootersconnectionstore.com/Dawson-Precision-STI-2011-HICAP-Magazine-Tuning-Kit-P705.aspx Link to comment Share on other sites More sharing options...
Pat Miles Posted January 27, 2010 Share Posted January 27, 2010 Feed lip width per STI info sheet: 38S, 38SC,9mm, 9x23---.355"-.360" 40 S&W---.385"-390" 45ACP---.435"-.445" Other individual mag tuners may have somewhat different dimensions. I tweak mine open with a small crescent wrench. When I am within a couple of thou I polish the inside of the lips with a fine diamond file and then do a final polish on my buffer feeding the lips into the wheel. I measure at the rear, middle and front of the feed lips. If the lips are too wide to begin with I use a brass hammer to close them up. CYa, Pat Link to comment Share on other sites More sharing options...
fred fague Posted January 30, 2010 Share Posted January 30, 2010 Measure the front and rear of the feed lips. The front measurement should be at the most .005 wider than the rear. If the front lips are narrower than the rear lips, the rounds will not feed as well. Link to comment Share on other sites More sharing options...
Seth Posted January 30, 2010 Share Posted January 30, 2010 Its seems that I'm the exception, but I put guts in a tube and go shoot. No massage required. I have almost 2 dozen STI/ SV mags that all run without adjustment of the feed lips. A couple of the SVs are out of spec and required a little beating to drop free, but they still run. Why not try and see if they work before worrying about them? Link to comment Share on other sites More sharing options...
anoshoot Posted February 1, 2010 Share Posted February 1, 2010 I agree with Seth, try them first........ Link to comment Share on other sites More sharing options...
cyburg Posted March 3, 2010 Author Share Posted March 3, 2010 I ordered them as parts, 3-140's and 1-170 with limcat base pads and I think grams springs and followers as per chuck at shooters connection and my buddy advised. 2 worked like a charm and the other 2 would not even hold the rounds the lips were spread out just a little to much. They are working good now thanks to everyones suggestions. A brass hammer, brass anvil base and a few wacks did some good. Oh ya, dont forget the the filing to get rid of the burrs around the lips. Smooth as silk now. Link to comment Share on other sites More sharing options...
echotango Posted February 3, 2016 Share Posted February 3, 2016 The dawson kit is worth the $$. Link to comment Share on other sites More sharing options...
jellyb Posted February 3, 2016 Share Posted February 3, 2016 ^^^worth every Penney + 1^^^ Link to comment Share on other sites More sharing options...
CanonSterVA Posted February 3, 2016 Share Posted February 3, 2016 Shooters connection has a DVD that explains everything. http://shootersconnectionstore.com/Dawson-Precision-STI-2011-HICAP-Magazine-Tuning-Kit-P705.aspx Will have to look into this. Thank you for the link. Myron Link to comment Share on other sites More sharing options...
bradsteimel Posted February 3, 2016 Share Posted February 3, 2016 +1 on Dawson kit. It comes with a very handy "tube holder" for closing the lips with a brass hammer, and a plyer-type tool for widening the lips. Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
jetjocky Posted February 3, 2016 Share Posted February 3, 2016 great DIY youtube video Adam from atlas gun works Link to comment Share on other sites More sharing options...
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