So last night I took my Glock 19 barrel and a 9mm round and inspected just how much "chamber support" there is (or isn't). On a Glock 19 Gen 3, in my opinion, it supports nearly the entire case. There is a very small amount of the case wall that isn't supported, but I suspect many modern service pistols would be quite similar in this regard.
I suppose it comes down to two points: Not trying to see how much powder you can put in a round before it blows up and inspecting each and every casing for warning signs before reloading.
My verdict is that I'll be find in regards to the brass. I'll probably get a Lone Wolf barrel someday just so I can shoot the lead bullets for targets and what not.
Suppose this one is decided for now. I think everyone gets "itches" to try something new sometimes....it is just hard to move from something that generally just works.
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GlockSpock's post in S&W M&P 9's vs Glock 9's was marked as the answer