cpa5oh Posted July 5, 2013 Share Posted July 5, 2013 I think there are alot of benefits to practicing with higher power factor gun/ammo and then competing at a lower (minor) power factor. Mainly, it makes grip and recoil control a priority in every practice drill I shoot. That helps me (I'm only a shooter of a little over a year.) With Glocks I can shoot my G35 in major .40 for practice and then shoot a G34 in 9 minor in matches. And frankly, I can shoot the Glocks flatter than I can the CZ's...yet the CZ triggers (with the SRT disconnectors) are unbelievably good. Obviously there's no .40 Shadow...so the question - how hot could I safely load my 9mm practice rounds to shoot through my Shadow? I know there are guys that have turned 75's into open guns, so I would think I'd be okay at 9 major power factors...but figured I'd better ask and get some thoughts before I do it. (I'd use a different powder than I use 9 minor and I'd work it up slowly over time.) Link to comment Share on other sites More sharing options...
kneelingatlas Posted July 5, 2013 Share Posted July 5, 2013 I wouldn't go much higher than 150pf without a comp, I've shot 180pf out of my CZ Open gun but a compensator counters some of the force on the barrel linkages. Link to comment Share on other sites More sharing options...
burningsquirrels Posted July 5, 2013 Share Posted July 5, 2013 I usuallu fly through the chrono at 142.... Link to comment Share on other sites More sharing options...
motosapiens Posted July 5, 2013 Share Posted July 5, 2013 PF is not really that relevant. It is chamber pressure that you should be concerned about. If you use a max load of power-pistol or some other slow-burning powder, I'm pretty sure you will get significantly more recoil than with a 130pf race load. Even at the same pf, power pistol produces a much bigger kick in my 40. Link to comment Share on other sites More sharing options...
kneelingatlas Posted July 5, 2013 Share Posted July 5, 2013 Good point Moto Link to comment Share on other sites More sharing options...
cpa5oh Posted July 5, 2013 Author Share Posted July 5, 2013 I'm not looking for simply the difference between two different brands of powder making the same power factor - honestly, when people talk about one powder shooting softer than the other for 9 minor, I might notice a tiny difference but not enough for it to matter. I played a trick on a guy at our club who had two different loads where he swore one shot softer than the other - I mixed his bullets into a magazine and wrote down the order and had him tell me which shots were with his "softer" load and he was worse than 50% in identifying his hot setup. I'm hoping for the difference between minor and major power factor, if possible. Is that not possible? Open guys are running 7-ish grains of AutoComp, for example...what if I took that powder and stopped somewhere short of 7 grains? Link to comment Share on other sites More sharing options...
kneelingatlas Posted July 5, 2013 Share Posted July 5, 2013 6 grains of HS6 should give you what you want. I would use a plastic guide rod or a recoil buffer to avoid tearing up you pistol. Link to comment Share on other sites More sharing options...
cpa5oh Posted July 5, 2013 Author Share Posted July 5, 2013 Will do both - thanks so much! Dan Link to comment Share on other sites More sharing options...
JamesLovesJammie Posted July 15, 2013 Share Posted July 15, 2013 You don't need to have a Shadow upper. Any CZ .40 upper would work. Just remove the firing pin block and spring from the slide. Voila. Shadow upper. Link to comment Share on other sites More sharing options...
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