I went with full size hard cases several years ago, so the long rods with no joints fit right in them with no issues,
And I use bore snakes for field cleaning, so again, no issues.
I would assume if you protected the muzzle crown and used a chamber type bore guide, cleaning from the chamber, you could use a military cleaning rod without damage, but I find the little military kits time consuming, have the POTENTIAL for damage, and frankly, outdated since my other cleaning brushes, mops, chamber/lug cleaners don't fit on them.
There is probably one or two laying around here within reach, but I don't see the point anymore with snakes and one piece rods...
Not like I'm squatting in the jungle with VC trying to take my head off and a rifle that won't extract/eject!