1899, is wildcatting practical, provide a material increase in performance, save money, stop hair loss? Not a hope BUT that's the whole point.
Wildcatting is THE cutting edge of reloading. This is where the experimenter and dreamer comes up with better mousetraps. Usually serve no real world purpose but that's not the point. It's a lot of fun and truly a hobby in and of itself.
Changing case dimensions, working with sizing/forming dies, fireforming, trimming, turning, reaming, basically cooking up something new and interesting, takes my range time to a whole new level. Bank account too.
I love wildcatting and will continue to do so. In fact, reached a point where I designed my own better mousetraps. One, the 6.5 Mystic, is actually unique and does give some real world benefits (at least in the eyes of the designer).
There are no wrong answers and certainly nothing much new. It's been or being done.
If you do play with the Savage/Stevens actions, wildcatting becomes a real breeze. You can get blanks, muck about with this and that, spin on the barrels and go see if you came up with anything worthwhile. Don't like it, spin off the barrel and go play with some other concept. All this in less then 20mins without the huge gunsmith bills.
It's a hoot and you will really learn alot about cartridges and how they work. Just be careful to not blow yourself up.
Ultramag, I doubt that your gunsmiths have seen any A&B barrels if they consider them smooth. I have played with a few and they are anything but smooth. Raw rifled barrels with a goodly amount of machine marks. Ultimately, that really doesn't matter as they can be smoothed out and shoot very well for the investment. Mine have been 1/2 MOA or better shooters.
Yes, Prechambered and threaded barrels are available for the Savage but access is sticky. MidwayUSA will not talk to anyone outside the US. There are other suppliers but you either have to export license them or go and pick them up stateside.
Enjoy...
Jerry