451_Detonics
Grandmaster
Here is another view of the relationship between the barrel and the ramp on the frame in a 45 1911. This shows the throat on the barrel is past the edge of the ramp on the frame. If that edge over hangs the frame ramp you have a sharp edge that can catch and stop a bullet keeping it from chambering. This barrel is throated for semi-wadcutters btw.
A interesting note...this gun was shot with ball last and wasn't cleaned, the shiny area shows where the bullet contacts the ramp and as you can see it is a very narrow, small contact. With that small amount of contact area a ramp would have to have huge, sharp machine marks to prevent feeding. A common misconception is a ramped barrel is done to help feeding, not true. A ramped barrel allows more barrel to enclose the base of the round thus allowing higher pressures without blowing out the brass at the ejector cut. This way Major can be made with even 9mm in the 1911.
Here is a ramped 38 Super barrel in one of my 1911's, was hard to get a good pic due to the scope mount but you can see the barrel ramp extends in a cut in the frame all the way to the mag well...
A interesting note...this gun was shot with ball last and wasn't cleaned, the shiny area shows where the bullet contacts the ramp and as you can see it is a very narrow, small contact. With that small amount of contact area a ramp would have to have huge, sharp machine marks to prevent feeding. A common misconception is a ramped barrel is done to help feeding, not true. A ramped barrel allows more barrel to enclose the base of the round thus allowing higher pressures without blowing out the brass at the ejector cut. This way Major can be made with even 9mm in the 1911.
Here is a ramped 38 Super barrel in one of my 1911's, was hard to get a good pic due to the scope mount but you can see the barrel ramp extends in a cut in the frame all the way to the mag well...