That. They were always listed at max 450 fps, which, with the 7grn match pellets of the day is a tad under 3.2.
It may be down to the ravages of time, or quality of rebuilds, but I’ve seen recent chrono tests varying from 3.2 or a tiny bit higher down to as low as 2 and a bit. But ending up on 2 having been higher suggests that something is amiss inside.