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I just purchased some recoil springs from Brownells and am somewhat curious. My factory BHP spring and the 2 stock 17lb. springs that I bought are all the same length. The 2 Wolf springs, an 18.5 lb. and a 13lb. are approx an inch longer. When I put the 13lb in the gun and pull the slide back with a spring scale it takes about 16lbs. of force to do it. The new stock factory spring takes about 17 lbs. which is what I would expect. The 18.5 lb. spring takes about 21lbs. of force to retract. I bought the 13lb. for reduced loads but with the 13 lb. spring in the gun I can't go any lighter on the loads and get reliable functioning than I can with a stock spring. Obviously I can cut some coils on the 13lb for lighter loads but does anyone know why Wolf makes their springs an inch longer than Browning?? Nick
 

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Hello,

I believe they are made longer to compensate for the "set" that springs take over time.

FN's spec's for new 9mm factory recoil spring free lenght is between 110 & 115mm.

I only use FN-Browning Factory Springs & Parts in my High Powers.

Take Care,
 
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