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Question about recoil springs

Discussion in 'Gunsmithing and Repairs' started by SRMohawk, Jul 17, 2006.

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  1. SRMohawk

    SRMohawk Member

    Feb 12, 2006
    Hey Fellas,
    I have this custom 10mm Auto longslide chiefly based on STI components for which I've been ordering batches of replacement springs from the smith who built it. But he can be so hard to get ahold of at times as well as quite absent-minded (guess it's that whole eccentric artist thing). Consequently, I've decided to just start ordering my springs directly from Wolff (these are the springs the smith used in the gun from the start and that he sells me pursuant to their needing replacement). But when I went to visit Wolff's website this morning, I found that replacement recoil springs for semi-auto longslide modifications (listed under Colt springs) are designated #1 thru #5. Wolff simply explained that this is because they had no way of knowing the precise tension weight of these springs. But in this case, these springs are rated from heaviest to lightest by the numeric designations 1, 2, 3, 4, and 5. Of course, I consulted the smith and he told me he knew for a fact that the tension weight of the recoil springs he was sending me is approx. 18 lbs. But that if I was planning on shooting hot loads in the gun I might need something in the neighborhood of 20 lbs. Unfortunately, he couldn't tell me which of Wolff's longslide recoil springs was an 18 lb or 20 lb spring!

    Now, if I'm feeding the subject gun a steady diet of hot ammunition (typically I shoot 180s @ 1200+ fps and 165s @ 1250-1300 fps) I know I can just dispense with the idea of trying springs #4 and #5. But that still leaves me with 3 choices, in which case #1 might be too much (too much in terms of beating the gun up with ######## return of the slide to battery) and #3 might still be too light to prevent the slide from smacking the frame like a sledgehammer on an anvil. I just don't know!

    What do you fellas know about it and what would you recommend? I know this question seems like alot of sugar for a dime, but I don't wanna order a bunch of springs that aren't right for my gun and then not be able to send them back because I put them in the gun and shot with them for a couple hundred rounds!
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