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Localizer

Recoil spring for Tanfoglio Stock I/II/III

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Posted (edited)

What recoil spring weight is helpful for smooth recoil impulse?

 

While I’m new at pistol shooting, it feels like I can’t shoot quickly with stock recoil spring.  It’s very possible my grip is what I need to modify and leave the pistol stock. 

 

After breaking each shot, sights don’t come back to the target...I have to reacquire, re-align sights, then break the next shot...

 

For reference, I’m running the following loads:

115gr RN

6.5gr HS-6

various cases

CCI/Fed SPP

Edited by Localizer

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I have a 9lb in my Stock II and like it well enough, but I recently got a Limited Custom in .40 and ended up with a 6lb in that.  When I shoot the Stock II now, racing the slide feels heavy, but the sight still returns well enough so I should probably leave it well enough alone.  Who knows, I may try an 8 or lower just to see.

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Wow! Thanks for fast responses!

 

A few more questions;

 

1. How heavy is the stock recoil spring?

2. Does a lighter lead to slide/frame recoil spring slide or frame damage?

3. What brand recoil spring should I purchase?

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8 hours ago, Localizer said:

Wow! Thanks for fast responses!

 

A few more questions;

 

1. How heavy is the stock recoil spring?

2. Does a lighter lead to slide/frame recoil spring slide or frame damage?

3. What brand recoil spring should I purchase?

1 Around 14lb

2 Maybe

3 Wolff 8lb std length

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Thanks guys.  

 

My pistol are Tanfoglio Stock III. I also have a Stock I.

 

I guess I need a long slide and standard slide lengths.

 

For Stock III: ?

Stock I: ?

 

sorry for asking too many questions.

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18 hours ago, zombywoof said:

8lb

+1

 

I run the 8lb and it feels nice. The 6lb seems too light and I am worried it will bash the sights loose. 

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Thanks guys.  
 
My pistol are Tanfoglio Stock III. I also have a Stock I.
 
I guess I need a long slide and standard slide lengths.
 
For Stock III: ?
Stock I: ?
 
sorry for asking too many questions.
Stock 1 and 2 have 4.5" barrels. They use the standard length springs.

Stock 3 and Lim Pro have 4.75" barrels which require the extended length recoil springs.

Sent from my VS987 using Tapatalk

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I went out and practiced yesterday. I also brought with me a 6lb recoil spring to test out the recoil impulse and effect on speed and noticed the following:

1. A lighter recoil spring increases felt recoil! I was surprised by that.
2. As a newbie I could feel the change in recoil impulse...more later.
3. The 6lb recoil spring is too light for a Tanfoglio Stock III...it cussed hangups and FTFs.
4. The lower spring tension makes tracking the slide almost effortless...very nice actually!

I have ordered 8lb recoil springs per advise here.

I’ll update on how it turns out.




Sent from my iPhone using Tapatalk

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First off, are you competing where a minimum power factor is mandated?  if so, i wouldn't go below 124gr bullet. The "smoothest" recoil will be 147gr at 130 power factor.

 

Recoil spring rate is a relationship between the smoothness of the gun's action, the ammo used and the shooter's grip.  my ideal spring may be 7# and your's 10. 

 

Test by filming the gun from the side, while firing a 5-6 rounds as fast as you can pull the trigger.  literally. 

 

Watch the video and see if the gun climbed or sank.  climbing needs a stronger spring. Sinking weaker.  ideally minimal up/down motion is seen.

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I’m just shooting production.

 

I went back and looked more closely at Quickload. Given my barrel length, I can reduce my 115gr load to 6.0gr and 124gr bullet to 5.0gr make minor power factor.

 

i just need to work through about 1,200rds I loaded to factory specs...sigh.

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Paradoxically the lightest bullet gives the harshest recoil (when power factor is held constant).

 

Shoot them up practicing! 

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Posted (edited)
10 minutes ago, johnbu said:

Paradoxically the lightest bullet gives the harshest recoil (when power factor is held constant).

 

 

Because "power factor" is a momentum formula, not actually power. To achieve the same momentum, a lighter bullet has to have more energy/power, which affects what the shooter feels. If he's loaded to factory spec (closer to equal power rather than equal momentum), the difference is a lot less pronounced and the light bullet may feel softer. 

Edited by Yondering

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Exactly!. I just didn't want to get into the "mv" vs '1/2mv2" thing. But your discription said everything i would have wanted to, only you did it better. 

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Cool, I'm glad to see that's well understood here. I've noticed on other forums the common take-away for a lot of guys is just "heavier bullets recoil softer" while ignoring the "when power factor is held constant" part. Those guys are usually referring to factory ammo, so the power factor is not constant. 

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Yeah, I understand the concept of momentum very well...I really should have looked at the numbers (powder charge, bbl length, and velocities) to settle on a powder and bullet selection.

My selection was made on the basis of safety (no double charge), & economy (115gr cheaper)...

I didn’t know till I started shooting matches that performance (per 1st paragraph) was just as important as my other criteria.

I’ll go practice w reduced charges of HS-6 & 124s I have on hand and report back.

Thanks again for all the feedback.



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