I have been considering a 9X23 in a single stacked 1911.
This is a very high pressure round and there are not many who manufacture for this caliber.
SV does and, by their reputation, should have a frame which would hold up well to this pressure--but it is expensive.
STI offers two frame, one on their Trojan and another-the 2011-on some other weapons.
I am assuming that all would withstand these pressures reliably, but, I would like some feedback from this forum as I keep abreast around here and I think your opinion is worthwhile.
Blessings