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SnidelyWhiplash View Drop Down
International Auto Mag
International Auto Mag
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Joined: 06 Sep 2021
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Points: 53 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SnidelyWhiplash Quote  Post ReplyReply Direct Link To This Post Topic: .45 Long Slide question...
    Posted: 22 Apr 2025 at 1:44pm
While it's not an AMT...I built a .45 Long Slide on a Brownell's 1911 frame and a Fusion Firearms slide and barrel.  I have it finished but have yet to test fire it...it passes all safety tests short of actual shooting.  

My question is...what is the proper recoil spring for a Long Slide?  It uses a standard length 5" recoil spring...just not sure of the poundage.  I have a standard 16 lb. spring in it now as that's what I had.  Due to added mass of the slide I'm wondering whether a 14 lb. or even less might be the better choice for proper functioning.  I know to use the heaviest recoil spring that still allows full functioning so there's that.  

Does anyone know what weight spring AMT specified in their guns?  
Rogue, raconteur and general pain in the ass.
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sirsaka View Drop Down
Callahan's Auto Mag
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Points: 828 		Post Options Post Options   Thanks (0) Thanks(0)   Quote sirsaka Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2025 at 2:04pm
AMT used a standard 16lb recoil spring in their Longslide pistols.
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SnidelyWhiplash View Drop Down
International Auto Mag
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Points: 53 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SnidelyWhiplash Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2025 at 3:38pm
Thanks for the info.  I had a 16 lb. spring in my gun but changed it to a 14 lb. after shooting it.  It was dropping empty cases right next to my foot...the 14 lb. spring gave it better ejection with no discernible difference in felt recoil.  
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International Auto Mag
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Joined: 15 Aug 2023
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Points: 51 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Yellow Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2025 at 6:59pm
Originally posted by sirsaka sirsaka wrote:

AMT used a standard 16lb recoil spring in their Longslide pistols.

No difference between the 45acp and the 10auto??
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SnidelyWhiplash View Drop Down
International Auto Mag
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Points: 53 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SnidelyWhiplash Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2025 at 9:04pm
I plan on building a 10mm Long Slide...hopefully in the near future.  When I do I'll start with a 23 lb. spring as Colt uses in their Delta Elite.  If that doesn't do the job of proper ejection I'll start going down in spring weight...just like I did with the .45.  14lb. spring seems to be the sweet spot for it.  
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