pdxrealtor Posted August 20, 2016 Share Posted August 20, 2016 What is the OEM recoil spring weight in the 75 B, and SP01 Tactical? I'm throwing brass with a FPS of ~ 1150 what seems like a mile. They feel very light when I rack the slide too. I can tell a big difference in racking the slide on my new SP01 vs. my well used 75Bs. I'm not one to tinker much with recoil springs but worn out parts are a different story. Link to comment Share on other sites More sharing options...
CZ85Combat Posted August 20, 2016 Share Posted August 20, 2016 Your brass should fall 6'-8' . SP01 #13, 75B #15 for every + 1# brass falls 1' less, for every - 1# brass falls + 1 '. a lot of people shoot 1050FPS target loads, much less recoil. I use a 11# in my SP01 Shadow and my 85 Combat, I'm using 1050FPS ammo. Link to comment Share on other sites More sharing options...
Exiledviking Posted August 20, 2016 Share Posted August 20, 2016 According to what I've read, the standard 75 recoil spring is 14 lbs and the SP-01 has an 18 lbs recoil spring. Link to comment Share on other sites More sharing options...
rowdyb Posted August 20, 2016 Share Posted August 20, 2016 18 is stock for sp01 yes Link to comment Share on other sites More sharing options...
pdxrealtor Posted August 21, 2016 Author Share Posted August 21, 2016 (edited) Thanks! Does anyone know why the stiffer recoil spring in the SP01? Edited August 21, 2016 by pdxrealtor Link to comment Share on other sites More sharing options...
Exiledviking Posted August 22, 2016 Share Posted August 22, 2016 Supposedly due to the pistol being designed to be used with NATO spec ammo which is pretty hot. NATO spec 9 mm is somewhere around +P and below +P+ loads. Link to comment Share on other sites More sharing options...
Exiledviking Posted August 22, 2016 Share Posted August 22, 2016 What is the OEM recoil spring weight in the 75 B, and SP01 Tactical? I'm throwing brass with a FPS of ~ 1150 what seems like a mile. They feel very light when I rack the slide too. I can tell a big difference in racking the slide on my new SP01 vs. my well used 75Bs. I'm not one to tinker much with recoil springs but worn out parts are a different story. Is the SP-01 throwing the brass that far or is it the 75B? Link to comment Share on other sites More sharing options...
pdxrealtor Posted September 18, 2016 Author Share Posted September 18, 2016 Sorry, missed this some how. It's the 75 b that was throwing the brass Link to comment Share on other sites More sharing options...
pdxrealtor Posted September 18, 2016 Author Share Posted September 18, 2016 On 8/21/2016 at 10:35 PM, Exiledviking said: Supposedly due to the pistol being designed to be used with NATO spec ammo which is pretty hot. NATO spec 9 mm is somewhere around +P and below +P+ loads. So...... If I like the way my sp01 shoots better than my 75b I could just swap the springs? Link to comment Share on other sites More sharing options...
Exiledviking Posted September 18, 2016 Share Posted September 18, 2016 So...... If I like the way my sp01 shoots better than my 75b I could just swap the springs? The recoil spring on the SP-01 is fairly heavy. The way to tune the CZ pistols for the proper recoil spring is to have the brass land 6 to 8 feet away with whatever load you normally use. If the 75B is launching your normal load's brass beyond that you should get a new or heavier recoil spring. How many rounds have you put thru the 75B with the current recoil spring? Link to comment Share on other sites More sharing options...
pdxrealtor Posted September 18, 2016 Author Share Posted September 18, 2016 I'm not sure on how many rounds through the 75s, in the mid to high thousands best guess. Isn't the 75 almost the same as the sp01? Link to comment Share on other sites More sharing options...
bigdave24 Posted September 18, 2016 Share Posted September 18, 2016 Another way to tune the recoil spring is to see how quickly you get back on your front sight. Too heavy a recoil spring often causes the muzzle to dip down after it rises in recoil. Link to comment Share on other sites More sharing options...
BMaus Posted September 19, 2016 Share Posted September 19, 2016 (edited) 18 lb recoil spring ? I believe 14 lb recoil and 18 lb hammer spring is standard on a SP-01 I am running 11 lb recoil and 13 lb hammer on my SP-01 Shadow (with standard firing pin). Edited September 19, 2016 by BMaus Link to comment Share on other sites More sharing options...
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