biglou13 Posted April 9, 2017 Share Posted April 9, 2017 (edited) Directions say tune for 6-8 foot ejection today I tried 11, 12, 13, recoil sprigs . From cajun all casings were ejecting from 10-12 feet im shooting an sp01 tactical. With Cajun pro package parts please advise Edited April 9, 2017 by biglou13 Link to comment Share on other sites More sharing options...
uewpew Posted April 9, 2017 Share Posted April 9, 2017 recoil spring is only one factor. The other big one is ammo. What kind of ammo / PF are you using? Were you shooting on grass or cement? When i tried the cajun recoil springs with SP01 shadow, with 132PF handloads, in grass, i could get the brass to throw 10 feet or dribble out. Ended up just sticking with factory spring. Link to comment Share on other sites More sharing options...
Prerunnertrd Posted April 9, 2017 Share Posted April 9, 2017 +1 with uewpew's comment. Ammo plays a part it in it as well. In addition to that, you want to tune it to where your slide goes back into battery that allows you to make your follow up shot quickly Link to comment Share on other sites More sharing options...
biglou13 Posted April 9, 2017 Author Share Posted April 9, 2017 (edited) havent chronoed latest load/bullet yet. im on the low end of book load. i was shooting on grass but i had a spotter and they all were hitting 10-12 feet. i was just experimenting with the different springs i have. trying to tune to the directions, and to figure out what is going on technically, i thought i would see different results with the different springs my grip and form is so much improved so that i cant or see any difference on the follow up shots with any of the springs i would have to use timer over a large sample size to get any real data. Edited April 9, 2017 by biglou13 Link to comment Share on other sites More sharing options...
vinceislander Posted April 9, 2017 Share Posted April 9, 2017 My Cajunized SP-01 Tactical spits out brass that far with factory ammo. It is just two feet shorter with my handloaded ammo, PF 130.I'm not too concern where the brass lands, as long as I can manage recoil effectively and my follow-up shots are fast and accurate.Sent from my XT1575 using Tapatalk Link to comment Share on other sites More sharing options...
MemphisMechanic Posted April 9, 2017 Share Posted April 9, 2017 (edited) 4 hours ago, uewpew said: recoil spring is only one factor. The other big one is ammo. What kind of ammo / PF are you using? Were you shooting on grass or cement? An even bigger one is grip. When you train yourself to really really grip the gun hard as heck then you can go a full recoil spring weight or two lower - if desired - without losing any reliability. Edited April 9, 2017 by MemphisMechanic Link to comment Share on other sites More sharing options...
magpulled Posted April 9, 2017 Share Posted April 9, 2017 I use and 11lb recoil spring and 8.5 lb hammer spring and my shadow ejects 6ft with my loads. Never shot factory through it. I'd assume it would be a little further with factory. I'm not concerned where the brass lands as long as the gun is tracking up and down and my sights get back on target quickly. Link to comment Share on other sites More sharing options...
biglou13 Posted April 9, 2017 Author Share Posted April 9, 2017 6 hours ago, MemphisMechanic said: An even bigger one is grip. When you train yourself to really really grip the gun hard as heck then you can go a full recoil spring weight or two lower - if desired - without losing any reliability. i'm a huge proponent for strong grip, and even train regularly for stronger grip.... i'm pretty sure my grip strength is well above average Dave @ cajun gun works says tune for 6-8 feet which is what i was trying to do. has anyone else tested /tuned with different weight recoil springs? what were your results? i'm not knocking following the internet trend for 11# spring it's what i usually run Link to comment Share on other sites More sharing options...
gixxerjunky Posted April 10, 2017 Share Posted April 10, 2017 I have been wondering about this as well. I need to replace my springs in my Shadow and the P09. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
SlvrDragon50 Posted April 10, 2017 Share Posted April 10, 2017 Well the message is that it varies from person to person so you're going to get a wide variety of responses. There's lots of tests on Youtube with video. Link to comment Share on other sites More sharing options...
optimator Posted April 10, 2017 Share Posted April 10, 2017 In on this one. I just converted my SP-01 to SAO yesterday. I shot it today for the first time. It fired and functioned just fine with my 3 gun loads. 147 grain Acme FP over 3.0 gr of Titegroup. IIRC they chronoed around 125 PF. It did have some dip though. I think I need to try a lighter spring. Link to comment Share on other sites More sharing options...
robertwyatt Posted April 11, 2017 Share Posted April 11, 2017 I just installed the 10lb white spring from Cajun. I'm shooting 133pf bullets. The thing I noticed over the previous 11lb was the sights are tracking back faster and more to the origin than with the 11lb. Maybe that's placebo effect, but i'm going to test it blind (not knowing which spring is in there) and see if the results are the same as I think they are. Link to comment Share on other sites More sharing options...
teros135 Posted April 11, 2017 Share Posted April 11, 2017 I have 10# (white) springs in my Shadow and SP01 Shadow, both with 147 gr bullets at 130 PF with Titegroup. Both return faster to POA than with 11# springs, which caused muzzle dip and slower doubles. No sign of frame pounding. Link to comment Share on other sites More sharing options...
robertwyatt Posted April 11, 2017 Share Posted April 11, 2017 11 minutes ago, teros135 said: I have 10# (white) springs in my Shadow and SP01 Shadow, both with 147 gr bullets at 130 PF with Titegroup. Both return faster to POA than with 11# springs, which caused muzzle dip and slower doubles. No sign of frame pounding. That's nice to read. I was hoping my results was being repeated with others. Link to comment Share on other sites More sharing options...
biglou13 Posted April 11, 2017 Author Share Posted April 11, 2017 What would be signs of frame pounding? Link to comment Share on other sites More sharing options...
my00wrx1 Posted April 15, 2017 Share Posted April 15, 2017 On 12/04/2017 at 6:34 AM, biglou13 said: What would be signs of frame pounding? Here is the full tutorial from Cajun Gun Works, according to point # 2 there is no such thing https://cajungunworks.com/technical-support/ Link to comment Share on other sites More sharing options...
teros135 Posted April 19, 2017 Share Posted April 19, 2017 I've never heard a coherent rationale about why a certain ejection distance from the gun is the prime criterion for recoil spring selection. It might be a "rule of thumb" sort of thing, or "conventional wisdom" passed on from one person to another, but how does ejection distance control either proper or efficient functioning, gun life, or (for that matter) safety? Link to comment Share on other sites More sharing options...
biglou13 Posted April 19, 2017 Author Share Posted April 19, 2017 dave @ cajun said so..... that is good enough for me to try to tune to that standard.... but re reading see link item #3 i'm satisfied the way may my muzzle returns to target... Link to comment Share on other sites More sharing options...
slavex Posted April 21, 2017 Share Posted April 21, 2017 133PF ammo, 11.5lb hammer spring, and 8lb recoil spring. shoots wonderfully. Link to comment Share on other sites More sharing options...
IHAVEGAS Posted April 21, 2017 Share Posted April 21, 2017 On 4/11/2017 at 1:14 PM, robertwyatt said: Maybe that's placebo effect, but i'm going to test it blind (not knowing which spring is in there) and see if the results are the same as I think they are. Smart. Would be interesting to have 3, two of the same weight, and compare results. Link to comment Share on other sites More sharing options...
CTD_P2A Posted June 24, 2017 Share Posted June 24, 2017 So it seems like the conventional wisdom for a jumping off point with a Shadow is to start with 13# hammer/main spring & 11# recoil (judging on what comes from CZC), but it seems that his is truly just a starting point. Every tabletop smith seems to be going lighter when pros like Matt Hopkins are using 14# springs...there really doesn't seem to be any one size fits all even though most of us Shadow users are using similar loads/springs/parts. Link to comment Share on other sites More sharing options...
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