Tactical Sport Orange Recoil Spring choices

[inkw8ll]

The TS Orange has a main spring of recoil spring of 16 lbs. installed. The TS comes with two extra recoil springs. The recoil springs are a 11 lbs. (short spring) and a 13 lbs. (long spring).

Essentially, outside of range time, is there any "math" that allows me to figure out what recoil spring to choose for my specific load. Ammo is an American Eagle 150 gr 9mm Total Synthetic Jacket velocity 870fps and energy 252 ft-lbs

My main goal is to use the DPM Recoil Reduction System which have spring choices of S1 5.73lbs, S2 6.61lbs, S3 7.3lbs and S4 8.4lbs; also included are buffer tubes: S(hort) 15lbs, M(edium) 19lbs and L(ong) 23lbs. I've emailed them and have not gotten a response back.

[six]

The way you tune your recoil spring is by shooting your choice of ammo and looking at the ejection pattern.

You want it to land in a neat little pile about 6-8 feet away. 

[BLUEPSTU]

I did use the dpm recoil system on mine but feel like I have better results with my lighter reloads by using the stock rod with a #10 spring. I have used that set up with several thousand rounds and it has not even bothered my little buffer pad at all.

[Sk2088]

Don?t know if this is true but I heard others say that the 2 non-16 lb springs have the same number of coils so the longer one has the lower lb rating. 

[George16]

My TSO came with the 16# main spring installed. There were two extra main springs in the box and they were 11# and 13#. I installed the 13# along with the 11# recoil spring and I liked the result with my reloads. However, when I reinstalled the 16# main string and used a 10# recoil spring, I liked the results better. The gun shoots flatter and had no visible muzzle flip compared the the 13/11# spring combo.

The ejected brass should be landing 6-8 feet away from the ejection port for a properly tuned spring combo.

Additionally, using the 13# main spring made my trigger pull kind of ?mushy? compared to the 16#. Trigger pull by the way is 1# 3.2 ozs with the 16# main spring. For the 13# main spring, trigger pull went down to 1# 1.2 ozs and ?mushy?.

[Sk2088]

First of all, I assume you are all talking about the 9mm version as the spring weight on .40 version are not all the same.

The right recoil spring weight needs to go with the type of ammo you are using. The heavier loaded ammo would need stronger recoil springs vs weaker recoil spring for weaker ammo. For factory ammo they probably are all in the range a stock spring can take. However, if you reload your own ammo for competition for example, then you may use weak ammo with weak spring in order to have less recoil.

If you get an overly weak recoil spring, the muzzle rise will increase and excess wear to the frame from battering would also increase. If you use an overly strong recoil spring, the recoil resistance may be too much to allow the slide to move back to properly eject the fired case or allow the magazine to feed the next round and the slide may not lock at empty mag.

You can start by trying your heaviest recoil spring one shot at a time and go down in weight until the slide locks at empty mag. That should be the spring to use.

A main spring (hammer spring) also adds to the effect of a recoil spring - increase of weight increases resistance of slide recoil. However it also comes with resistance to trigger pull on a DA pistol.

If the spent casings are hitting the ground beyond 6-8 feet that means the slide moves back too forcefully, a stronger spring may be needed. If the casings are rejecting less than 3 feet, a weaker spring may be needed.

I have a .40 model and I haven?t found I need to change any stock springs so far for factory ammo.

[tdogg]

The recoil springs shipped with the TSO are the same between the 9mm and 40S&W variants.  Confirmed by CZUSA.  I didn't actually confirm the main springs, although these weights are similar across all CZ platforms.

CZ USA got back to me on spring weights included with the TSO:

The TS Orange has a main spring of 20 lbs. and recoil spring of 16 lbs. installed. The TS comes with two extra main springs and recoil springs. The recoil springs are a 11 lbs. (short spring) and a 13 lbs. (long spring). Main springs are 13 lbs. (short spring) and a 16 lbs. (long spring).

Just FYI.

Cheers,
Toby

To answer your question, the best recoil spring is one that allows the gun to function 100%, keeps the ejected cases ~6-8 ft away, and allows the shooter to regain the target/sights the fastest between shots (fastest splits).  It's really shooter and ammo dependent, thus no way to mathematically model effectively.

Cheers,
Toby

[muncie21]

I tried the 6-8' rule with my TSO .40, shooting major PF (172-175) loads.  Got up to an 18# spring with the cases still ejecting some 12-15' from me. At this point the heavy spring snapped the slide back with enough force that the front sites would 'dip' when the slide returned to battery.  Now I'm using a 13/14# (can't recall which) recoil spring and considering going a tad lower, depending on how the sights react.

This pistol is used for USPSA competition, so I'm not looking to hand it down to the next generation in my family. 

[tdogg]

I tried the 6-8' rule with my TSO .40, shooting major PF (172-175) loads.  Got up to an 18# spring with the cases still ejecting some 12-15' from me. At this point the heavy spring snapped the slide back with enough force that the front sites would 'dip' when the slide returned to battery.  Now I'm using a 13/14# (can't recall which) recoil spring and considering going a tad lower, depending on how the sights react.

This pistol is used for USPSA competition, so I'm not looking to hand it down to the next generation in my family.

Yep same here.  Actually on all my cz 40cal guns, I can't get cases to land in the recommended range.   My 40p is the worst offender,  landing in the 15-20ft range.   I shoot my TSO with the stock recoil spring and they land in the 10-15ft range.

Cheers,
Toby

Sent from my SM-G950U using Tapatalk

[George16]

I?m using a 10# recoil spring for my reloads which is around 128-130pf. It?s the perfect combo for me for shooting production.

[six]

I?m using a 10# recoil spring for my reloads which is around 128-130pf for production minor. It?s the perfect combo for me for shooting production.

In a Tactical Sport?

[George16]

I?m using a 10# recoil spring for my reloads which is around 128-130pf for production minor. It?s the perfect combo for me for shooting production.

In a Tactical Sport?

Yup. But not on production minor.

However, I made a mistake at the end of my sentence. For production, I?m using a 10# recoil spring also on my shadow 2. I do shoot the same reloads on the TSO and shadow 2.

Sorry for the confusion.

[muncie21]

I run a 10/11# recoil spring in my TSO 9mm, shooting loads at 130-135PF.  Very flat shooting; virtually no muzzle flip.