Cutting Automatic Pistol Recoil Springs (or Not)

[MEHavey]

So ~½% higher at end of stroke ?

Sufficiently counterintuitive that if so,
one ought to make this Covo a sticky.

 

[Jackiesman]

Earlier I posted my problems with a Walther P22 JohnKSa mentioned that the P22 was known to require high velocity ammunition. Since I only have standard rounds I’m looking to purchase a reliable 22 auto that is known to work well with standard rounds. Does anyone have a suggestion?

 

[Howland937]

Earlier I posted my problems with a Walther P22 JohnKSa mentioned that the P22 was known to require high velocity ammunition. Since I only have standard rounds I’m looking to purchase a reliable 22 auto that is known to work well with standard rounds. Does anyone have a suggestion?

Perhaps create a new thread in the autoloader section to ask. New thread will get more eyes than an unrelated question in a spring-math discussion.

 

[Jackiesman]

Perhaps create a new thread in the autoloader section to ask. New thread will get more eyes than an unrelated question in a spring-math discussion.

Thanks

<<Here's the link to the thread. JohnKSa>>
https://www.thehighroad.org/index.p...-ammunition-advice-for-another-member.902416/

 

[lysanderxiii]

So ~½% higher at end of stroke ?

Sufficiently counterintuitive that if so,
one ought to make this Covo a sticky.

That's because the spring is stiffer.

 

[lysanderxiii]

Oh, and for those wondering why the standard 1911 recoil spring is a "10 pound spring" when neither the pre load nor final load is 10 pounds.

10 pounds is the maximum load the spring should see if you do not want to over stress the wire.

Yes, the spring is over stressed. Most recoil and magazine springs are loaded beyond the "maximum load". This is why they wear out in several thousand cycles, if the loads were under the maximum they would last millions of cycles.

So why are they designed to be overloaded? Space limitations, play around with springs that have a design load of 15 pounds, and have a working length of two inches.

 

[Jim Watson]

4.85 (compression) x 2.825 (rate) = 13.701 pounds

I remember when Tuner went through that and I wondered why Wolff wants to sell you a 16 lb spring.
Somebody figured that current commercial Colt .45s were shipped with 14-15 lb recoil springs.
Baer and other small makers tend toward even higher spring loads. Is it to ram their tight guns closed?

 

[lysanderxiii]

I remember when Tuner went through that and I wondered why Wolff wants to sell you a 16 lb spring.
Somebody figured that current commercial Colt .45s were shipped with 14-15 lb recoil springs.
Baer and other small makers tend toward even higher spring loads. Is it to ram their tight guns closed?

A heavier spring is a stiffer spring. The main drive for heavier springs is increase the force at maximum compression, or to put it a different way, slow the slide velocity faster.