This makes sense. I think when you plan on doing what I'm doing which is just concentrating on 10mm savings will come. Especially when you consider the price of real 10mm loads. Double Tap is at a buck a round. Underwood is near .75. The savings won't be immediate and that really isn't my #1 focus. Anybody who knows 10mm knows that supply is there for a week and gone for 3 months, especially in the foreseeable future.
New question for 10mm reloaders that shoot Glock 20. Which aftermarket barrels have you found that does the least amount of brass damage?
I'm not sure I'm following you. I was not aware barrels damaged brass, unless they were out of spec. There are several makers of 10 mm barrels and Glock has a decent selection, Bar-Sto, KKM, Storm Lake and Lone Wolf (Chinese import). I'm sure I left out one or two.
The issue you may have and I did a thread on a red neck bore hone "Bore Horny" in the Gun Smith area may be your reloads may not fit well in a tight tolerance barrel even with factory new brass, re-sized and ran through your dies.
Lone Wolf will open up the chamber if you send them a few (inert) of your rounds. I think most will charge you for this. I did it myself from stuff lying around the man cave.
None of the barrels will cause damage unless the chamber is excessively out of tolerance.
As for reloading if you are on a tight budget what it really does is allow you to shoot more. Start shooting cast lead and the cost per round goes way down. Scrounge your own source of cheap lead and start casting your own bullets and the cost starts approaching the powder/primer cost especially if you sourced free lead.
I don't often count the cost of brass as I have been scrounging range brass since I was 8 (40 years’ worth). The 10 mm is not one I tend to pick up scrounging so you may want to purchase it. Starline makes about the best brass for the coin spent.
https://www.starlinebrass.com/order-online/all-cases.cfm
For maximum loads I only use new unfired or once fired brass. My range brass is for plinking/practice/training.