9mm vs 45 cal
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9mm vs 45 cal


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Old 02-20-2010, 11:25 AM   #1
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Default 9mm vs 45 cal

I am considering a 9mm 1911, thinking that the smaller caliber would offer a manual slide operation and disassembly more easily performed than a 45 cal 1911.

Just discussed the idea with a gun dealer who stated that because the barrel pressure of a 9mm is 35k psi versus the 23k psi of the 45 cal call for a stiffer recoil spring, therefore, the 9mm would be the stiffer gun in manual slide operation as well as disassembly.

Any one have any real experience in this area?
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Old 02-20-2010, 01:04 PM   #2
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IMO, if you want a 1911, the ONLY way to go is .45, Thats what they were designed to shoot.
I own 2 .45's and have handled a few 9mm's, I can't really tell a difference in recoil spring strength.
It does, however vary with the manufacturer. For instance, the recoil spring on a Para Ordnance .45 is stiffer than the spring in my springfield .45's.
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Old 02-20-2010, 01:25 PM   #3
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Quote:
Originally Posted by jpratt825 View Post
I am considering a 9mm 1911, thinking that the smaller caliber would offer a manual slide operation and disassembly more easily performed than a 45 cal 1911.

Just discussed the idea with a gun dealer who stated that because the barrel pressure of a 9mm is 35k psi versus the 23k psi of the 45 cal call for a stiffer recoil spring, therefore, the 9mm would be the stiffer gun in manual slide operation as well as disassembly.

Any one have any real experience in this area?
Is this a serious question? Are you really asking whether you should base your choice of caliber on the stiffness of a spring or how difficult it is to rack the slide or disassemble? If those are real issues get a revolver.
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Old 02-21-2010, 01:19 AM   #4
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I just shoot .45acp and 10mm in mine.
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Old 02-21-2010, 07:52 AM   #5
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Get a revolver if you want simplicity.
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Old 02-21-2010, 10:50 AM   #6
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I have 2 9mm 1911's the springs are lighter than 45. I run a 15 lb in my 5" 9 vs either stock 16lb or my prefered 18.5 in the 45.s
The Kimber AGEIS Pro (commander size) 9mm that I have I am not sure what spring weight is in it as I have not shot it enough to replace yet.

If you seriously want a 9mm 1911. I strongly endorse the Kimber AEGIS series.
Mine has run flawlessly
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Old 02-21-2010, 11:18 AM   #7
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If you want a 9mm John Browning pistol get a BHP.

It was designed as a 9mm, the 1911 was intended to be a 45 ACP.

Nuff said!

Argentine FM 90 Hi-Power, 9mm. Excellent condition
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Old 02-21-2010, 11:55 AM   #8
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I'm with cane, if you want a 9mm, get a high power. The 1911 needs to be a 45.
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Old 02-21-2010, 12:42 PM   #9
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I don't necessarily feel that way.
the Hi Power's or most other guns in general don't feel and shoot for me as well as a good 1911.
I have 2 9mm's, 1 10mm with one more on order and a .460 rowland in the works along with and 5 in 45.
But my 9 mm fusion as just pure shooting joy.
It is not a carry gun like my Kimber but I use it for both steel plate competition and cheap lead bullet plinking.
It is one of my most favorite 1911's If I had followed advice not to own a 1911 in 9mm I would have missed out
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Old 02-21-2010, 01:24 PM   #10
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Thanks, my problem is age and strength of my hands. I have difficulty operating the slide on the 1911's but prefer the feel of a good steel frame with the balance and weight of the 1911 over the new polymers.
If the 9mm is stiffer bescause of the difference in recoil spring requirements, then I will stick to the 45 and install a good progressive spring and two piece guide rod.
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