IMHO, if I were going to make up another ''switch'' barrel rifle, I would go the route of using a "Savage" jam nut, rather than a shouldered tenon.
Switching out the barrels can be quick and easy but when you're snugging up the shoulder of the tenon the face of the receiver, you always get some ''crush'' distortion.
I did up a Remington 700, switch barrel rifle a three decades back, after reading an article in "GUNS" magazine.
I made up four barrels for this experimental, to me, system.
The four switch barrels were chambered 8x57/270Win/30-06/7-08.
These cartridges were chosen because I had new take off barrels on hand and they were what I was using mostly at the time, other than the 338-06, which I didn't have a spare barrel for at the time.
Every time a barrel was swapped out, it was like starting all over again, even though nothing was changed in between.
I'm not saying it didn't work well, because it did.
The thing is, every time a barrel was taken off, it never went back on to exactly the same location, because of the minor amount of crush, from the last install. The indexing creeped.
This really isn't a huge issue but it was always more time consuming than what I had hoped for.
I ended up selling that rifle and its four barrel set. I believe the fellow that bought it, sold off three of the barrels and kept it as a dedicated 270Win.
The Savage Jam Nut method of installing a barrel is IMHO much more repeatable and with mate marks can easily be indexed to exactly the same spot every time, which lessens the amount of work up needed to find the accuracy sweet spot again.
Yes, it's nit picky. When push comes to shove, I'll take a dedicated to one cartridge, shoulder/receiver face matched rifle every time.
That way, if I feel the need for a different cartridge, which can and does happen regularly, I just pick up the rifle built for the job from the safe and grab the appropriate, previously loaded/sighted ammo and go hunting, with confidence in my eqipment.
My go to hunting rifles, at this time are 338-06/338-08/8x57/30-06/7x57/6.5x55/257Rob/244Rem/243Win/22-250Rem and a few more down to the 22Hornet, then the rimfires.
None of them are switch barrel rifles, although some of them no longer wear their original barrels.
