Posting this as part hypothetical, part understanding an actual issue, and looking for some thoughts. This is specific to the AR-15 (NOT the AR-308) and I'm not actually trying to prove what I'm asking is true, instead I'm trying to understand if this is even possible. That said, here's the background, followed by the question:

Weapon:

-12.5" not-overly-gassed carbine-length gas system by a quality, known manufacturer
-Quality BCG by same known manufacturer with less than 3K rounds
-Spike's T2 (or whatever it's called) buffer and proper spring with 3K rounds
-SF Legacy muzzle brake (so maybe just a slight bit more back pressure than a FH)
- Ammo is Federal M193

Scenario:

Weapon runs like a sewing machine. No issues for almost 3K rounds.

Question:

Would changing out the buffer to a carbine weight buffer (and brand new LMT action spring) cause a condition that would result in sheared lugs on the bolt within less than 15 rounds of shooting?

Discussion:

I understand bolt bounce is a thing (though I can't prove it was or was not happening with the carbine buffer), but even with it, would there be a scenario where the lighter buffer would cause lugs to shear? I wouldn't think so, but I'm open to learning new stuff.