Which aftermarket barrel?

[Cuba 71]

On my last visit to the range y had a kB with my Glock 17, I assume it was a case failure since it was a reload (3.7 gr CLAYS under a 115 gr FMJ).
I'm looking for an aftermarket barrel that provides better support than the Glock stock one.
Any recommendations?

Note: I'll be installing a Lee U sizing die and keeping track of number of times the cases are reloaded, to minimize the event from reocurring.

[Duck of Death]

I put a KKM in my G23. It is reliable and accurate. My G17 FZP*** has a tight chamber and adequate case support. I've not felt the need the replace it. If you didn't ruin the 17 barrel check it for support and tightness. It may be some other problem if these check out.