G'Day Fella's,

Yes Nitro X, the 1911 in .45 ACP was exceedingly popular.
Back in those days, there was less restriction on What and How Many handguns you could own.
So pretty well every body at the club, that shot IPSC, etc, had at least one .45 ACP.

The serious competition shooters and "Wanna Be's", had moved over to the .38 Super, 9x23 etc, as you had more magazine capacity and less recoil. But these blokes probably still had at least one .45 ACP.

Hope that addresses your question?

Regards
Homer