When S&W reintroduced the 24, (known to all of us as the 24-3), they completely underestimated the demand. They thought it was just a small, core group of diehard .44 Special fans. That's why they announced it as a limited edition of 7,500 pieces, to be as close to the original as possible (ie: same barrel lengths: 4" & 6.5"). The Lew Horton 24-3 special order with 3" barrel came about a year later. Yet, the demand still persisted.
The idea behind the 624 was to curcumvent the promise they made regarding the 24-3 being a limited edition, yet still find a way to satisfy market demand by offering a standard production .44 Special revolver.
So, the 624 was intended to be exactly the same as the 24-3, the only difference being the use of stainless steel. These standard production revolvers were offered in 4" & 6.5". The 624 with 3" barrel was another Lew Horton special order.
To make a long story short, and reiterate what has already been said, the 624 was made with a 6.5" barrel, not a 6".
Back then, it was sort of a big deal that S&W went with the 6.5" instead of using the 6" barrel that was then
"de rigueur" across the full product line.
