Original Barrels?

[Neil 0]

I was comparing the barrels on my Johnson rifles and noticed that the barrels were different. Are these both original barrels? I’m wondering if one is a "new" barrel by taking another barrel (like an '03 or M1917 barrel) and cutting it down and adding the bushings and barrel collar etc. I believe I’ve heard of that being done. 

 

Link to pictures:

https://imgur.com/a/0ytCo

[Joseph Scott 0]

The one marked "J. A." with four/five digit number is factory original.  I believe the one marked "JS" is one I made using a CNC contoured Shilen blank.  Of all the aftermarket barrels I have seen, none were marked by the maker except mine.  I worked from original blueprints and did not mark a barrel until after I tested fired it.  Most commonly,  replacement barrels were made from M1 Garand barrels.

[M48TANKER 0]

A question for Joe Scott.

If the new barrel weighs a bit more than the old Johnson barrel, will this affect the function of the rifle. Specifically, as in using a 1903 barrel to replace the Johnson barrel?

Edited November 19, 2017 by M48TANKER
clarification

[Ed Johnson 0]

Theoretically, it might, depending on how much weight is involved. Do you know the total weight of each barrel?

[Joseph Scott 0]

If the barrels have the original contour, they will weigh the same and have no effect on functioning.  I have never seen or heard of a "heavy" barrel, or having a different contour (except the 7mm),  remember gun is designed to function with bayonet attached.