No Muffet you take the original out and wear out the replacement barrel and if and when you sell the ol'girl screw in the original providing you tell the story to the new buyer they may say crikey leave the new barrel in and I will take the original for an agreed whole deal price.
I have been collecting WWI Lithgowstamped parts for my '16 for the last 10 years right down to the front sight wedge, bands, front sight block and windage sight, sears, trigger, cocking piece, bolt heads, mag, Mag floor plate, Mag cut off routed rear sight protectors, dumbbell, safety catch etc all star stamped so if I ever ever decide to sell it can go with a good set of spares.
And I can keep it fairly close to original specs
Post script - Think Muffet was referring to collectible weapons being down graded in value due to the owner throwing away the original barrel, but I would keep it and let it go with the rifle my '16 is not that good on the range but it is what it is.