1911 - 9mm vs 45 ACP

1911 Extractor Test: http://modernserviceweapons.com/?p=131

This is the test that Ken Hackathorn, Bill Wilson and Larry used for years. It was made popular after the above article was posted on the Modern Service Weapons blog and it became known as the 10-8 Extractor Test.
 
Nice quickie comparison.

First time I've heard anyone recommend a non-ramped bbl. Why? and why only in steel w/5" bbl?
 
The traditional non-ramped barrel tends to feed more reliably in a 5 inch .45acp gun.
 
Amp Mangum said:
The traditional non-ramped barrel tends to feed more reliably in a 5 inch .45acp gun.
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Well, yes, I guessed that was prolly the case... Rephrase: why does it feed more reliably in 5" than in 4.25" or 3.25", or, as Vickers said, in aluminum framed 1911s? EDIT or 1911s of different caliber?

I accept that it does, I'm just having difficulty getting my head around why [imagines circles & arrows and paragraphs on the back of each one...]. Does the angle of the ramp vary with bbl length? Is it the geometric difference inherent in the longer bbl/slide combo?


Would polishing the feed ramp help? :D
 
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Ramped barrels have better case support for hot loads. Back in the day when hot .38 Super loads were the ticket for USPSA/IPSC competition, cases would rupture because the case wasn't fully supported. Ramped barrels fixed that.

Ramped barrels can make shorter rounds like 9mm and .40SW feed better because of the built in feed ramp.

Ramped .45acp barrels tend to have very steep feed ramps that don't feed well. Some manufacturers have started to use them on aluminum frame guns because hollow point bullets will chew up the feed ramps on pistols without them.
 
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quick question... Im seeing alot of 1911s with taller sights on them i guess for optics or supressors. my question is if you dont put the optic or supressor on, are the sights accurate to point of aim?
 
Mr. Bggs said:
quick question... Im seeing alot of 1911s with taller sights on them i guess for optics or supressors. my question is if you dont put the optic or supressor on, are the sights accurate to point of aim?
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I cant speak for .45 1911's with optic ready iron sights, but with my 9mm POA is no different than standard.
 
B00ger said:
I cant speak for .45 1911's with optic ready iron sights, but with my 9mm POA is no different than standard.
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good to know. I always wondered when i saw those tall sights if you need to aim at the floor. thanks BOOger
 
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