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Old 06-19-2017, 03:14 AM
Tubahokie Tubahokie is offline
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Join Date: Jun 2017
Posts: 1
Kimber 10mm question

I have purchased a Kimber TLE/RL II. I love 10mm. However, I have tons of 40 S&W ammo from some bad mistakes of liking the 40 at one point. Since the 10mm is just a longer 40, could I put in a 40 1911 barrel into my Kimber and it work? Also 10mm is really expensive to shoot compared to 40 and since my wallet is crying from my Kimber purchase, I'd like to save a few bucks.
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Old 06-19-2017, 03:51 AM
desmodromic desmodromic is offline
Join Date: Nov 2016
Location: Manila Philippines aka wild west of asia
Posts: 226
I am not a gunsmith but I saw on the "Parts" section of gun companies that the .40sw extractor and 10mm extractor have different part numbers. So I am thinking you may have a problem extracting spent cases.

also firing pin of 10mm has a different part number. I am thinking that since it 10mm is a longer casing, it will need a shorter firing pin.

experts correct me if I am wrong since I am new to 1911's
For defense Glock 21 and Berreta 92M9A1.
For collection purposes Les Baer Ultimate Master Combat and SVI infinity .40 cal. Wilson Combat Protector. Nighthawk Predator
In order : Edbrown SF 9mm(6-9 months), Ed Brown Classic Custpm . 2 SVI pistols, Wilson Combat Classic Supergrade , Cabot Jones Classic, UZI upp9sb auto
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Old 06-19-2017, 10:24 AM
hink1911 hink1911 is offline
Join Date: Feb 2017
Location: southbury, ct
Posts: 81
The difference in part numbers is probably due to the fact that the 10mm is a higher pressure round. I've seen videos on youtube of people shooting 40 s&w out of 10mm guns without incident but I wouldn't recommend it. Having a 40 barrel would mitigate most risks but legally speaking; have a proper gunsmith fit and check the barrel before shooting.

40 is just 10mm short
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Old 06-19-2017, 11:52 AM
Rock185 Rock185 is offline
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Join Date: Jan 2002
Location: Central Highlands of the Great Southwest
Posts: 2,661
Tuba, haven't done a 10MM/.40 conversion, but have done more than one 38 Super/9MM conversion that functioned flawlessly. I have owned and reloaded for both 10MM and .40 S&W pistols. IF I were interested in the conversion you asked about, I would fit, or have fitted,a .40 barrel and go from there. Thing is,while some of these conversions are not very complicated, they may require some tuning once the parts are installed. This fine tuning benefits from having someone familiar with 1911 work in various calibers. While dedicated .40 S&W magazines might be beneficial, and a different recoil spring, I question the need for different extractors, ejectors, firing pins, etc. You might want to discuss this conversion with a gunsmith you trust. Don Williams of action works, Chino Valley, AZ. might be a good man to talk to. You might call Kimber too. For about $400.00 or so they might provide and fit a .40 barrel for you.......

BTW, When I did my 38S/9MM conversions, I used dedicated magazines, but the same extractors, ejectors, firing pins, recoil springs, etc.
NRA Life, COTEP 640

Last edited by Rock185; 06-19-2017 at 11:56 AM.
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