Posted: 6/2/2026 9:41:52 AM EDT
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Cross posted from 1911 forum: I have this in the Commander length in 9 mm and through some checking found out they come from the factory with a 9 lb. spring. That sounds a bit light to me from what I can find out from various sources online. My concern is longevity of the pistol, although in fairness I only shoot it about 10 boxes a year at most primarily with 115-124 grain bullets, factory loads as well. I’m considering a 12 lb. spring or am I just overthinking it and shouldn’t be concerned? |
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I'm not really familiar with 9mm 1911's, but with 45's, too heavy of a recoil spring has been rumored to be able to induce stresses on a 1911 as well as too light (I'm talking about like super heavy used for shooting +P and +P+). I replace my 1911 recoil springs with Wilson Combat flat springs. Based on the size of the pistol, caliber, and power factor of the ammo I plan to shoot. For example, I have a Springfield Mil-Spec and I replaced the 16lb factory spring with the 17lb Wilson Combat flat spring. I will shoot normal defensive +P loads sparingly based on that Wilson says it is okay to shoot +P with that kit. Wilson doesn't make the flat springs for the commander to my knowledge, but they do make a conventional 12lb coil spring for the commander in 9mm and they recommend using this 12lb spring for ammunition with power factors between 130,000 to 150,000. Winchester white box has a power factor of (115 gr X 1190 fps) 136,850, so a 12lb recoil spring seems pretty reasonable based at least on this Wilson Combat spring. |