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1/25/2018 7:38:29 AM
Posted: 3/18/2006 11:03:40 AM EST
[Last Edit: 3/18/2006 12:59:59 PM EST by pistolwretch]
I see a lot of problems with feeding that can be attributed directly to an improperly machined feedramp.
When the feedramp is done correctly, there is NO need for elevated mag catches or special magazine designs that present the rds higher than original 1911 specs.
Several of the 1911 clones, yes even those by the top of the line semi-custom shops, are crippled by shallow feedramps.
A proper feedramp extends south of the top of the frame to a .420" depth and is cut at 31 to 31.5 degrees. The bottom of the feedramp should be just above the bottom of the slide stop lug cutout.
I've seen guns done by big name shops that have feedramps only .280" deep.
They will work with ball and sometimes with selected hollowpoints through selected magazines, but they still are not 'right'.
I'll take pics of the next one to cross my bench, and of the process to correct the geometry.

Slightly shallow original feedramp. Measures .335" deep.


Setting it up for re-machining at 31.5 degrees.



After final polishing. Now measures .400" deep.


Link Posted: 3/18/2006 12:53:08 PM EST
Thank you for sharing!
Link Posted: 3/18/2006 1:34:49 PM EST
Big +1 Chuck Rogers. Charles the Gunsmith.
Link Posted: 3/18/2006 1:38:59 PM EST
Sure looks pretty. What can we use (cheaply) to tell if ours are in spec?
Link Posted: 3/18/2006 1:46:21 PM EST
Good stuff, thanks for sharing.
Link Posted: 3/18/2006 6:11:24 PM EST
Hey Yoda, can I move up to Prescott Valley for a little while? My job is getting boring....
Link Posted: 3/25/2006 8:16:28 AM EST
Link Posted: 3/25/2006 3:26:42 PM EST
Link Posted: 3/26/2006 2:24:44 AM EST
I swear, with all the good great information everyone shares on the forum I will be a pistolsmith before you can say "Rock Island Armory".

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