cecil Posted January 26, 2013 Share Posted January 26, 2013 I am thinking about getting a STI grand master.. 9mm... can the 9mm cycle with a MINOR load ?? ? and what is involved to make it do so.. I understand a STI steel master will .. but i like the looks of the Grand Master.. but would prefer not to use a MAJOR load because i shoot a Glock 19 and use minor.. tia Link to comment Share on other sites More sharing options...
CocoBolo Posted January 26, 2013 Share Posted January 26, 2013 (edited) Yes it will cycle MInor loads. Let me give you one that will work like a dream. 115gr jacketed bullet JHP or CMJ only and 5.6 grains of AutoComp, or with a 124gr 5.2gr of AutoComp. No they won't put a smile on your face when shooting your tupperware, but not bad. This will produce about 135-140pf and run and shoot nicely in the Grand Master. Do not go below a 9# recoil spring in the gun, lighter springs will cause reliability problems, once it is well broken in you can try an 8#, or even 7#, but again you can get FTF with light springs. Edited January 26, 2013 by CocoBolo Link to comment Share on other sites More sharing options...
Paul-the new guy Posted January 26, 2013 Share Posted January 26, 2013 The GM has a light recoil master in it from the factory Link to comment Share on other sites More sharing options...
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