1911 ramped /throated barrels

[vaskeet]

here are the end views ramped barrel 1st

 

[Burt Gummer]

If you tell folks you ground on those with a dremel tool, they gonna wear your ass out lol

 

[vaskeet]

side view

 

[vaskeet]

No I will not grid on either this was to show Millie the difference between a ramped 1911 and a throated 1911

 

[Millie]

Thanks for the pics, I think mine is the ramped one. Maybe.

 

[rdinatal]

I thought all 9mm 1911s had ramped barrels?!?

Nor true???

 

[vaskeet]

I thought all 9mm 1911s had ramped barrels?!?

Nor true???

Not True I have 4 1911 9mm guns 2 STI 1 RIA single stack and 1 RIA double stack none of which have a ramped barrel (they all work great) now both my 40 S&W and 10MM 1911 have ramped barrels in fact the throated barrel above is the 9MM RIA and the ramped barrel is the RIA 10MM

 

[John Travis]

Thanks for the pics, I think mine is the ramped one. Maybe.

It is.

One small point if I may.

The "throated" barrel.

Although it's become common to refer to that area as the throat, it's actually the barrel ramp. The barrel throat is the area just forward of the chamber shoulder, and called the leade when talking about rifles.

When the practice of opening the original barrel ramps to use with shouldered SWC bullets, it somehow started being called "throating" the barrel. Even Jerry Kuhnhausen...as wrong as he's been on many points...referred to it as "ramping" the barrel.

The barrel ramp...or "throat" if you prefer...correctly functions as a clearance and not a bullet guide. If all is within spec, the bullet most won't touch it below the top corner, or at most, lightly brush it as it glances off the feed ramp and heads toward the chamber. And if all that happens, the bullet and case glide over the top corner and and apply a downward force on the barrel instead of having the bullet make contact in the ramp and pushing the barrel forward ahead of the slide...which causes the barrel to vertically engage the slide too early...which can cause the front barrel lug corners to crash into the rear slide lug corners and cause failures to go to battery and even the dreaded 3-Point Jam.

And this is what often causes problems with integrally ramped barrels. By design, the bullet nose hits the ramp and pushes the barrel forward. With that type of barrel, the ramp angle is even more critical than with the divorced barrel and ramp setup...and that type allows very little wiggle room. Barrels with the integral ramp pretty much have to be perfect.


It all boils down to correct specs.