Earlier--the post vanished in the migration--There was a reference to this Gunblast article showing the 327 getting 1600+fps from revolvers for ~115gr bullets.
http://www.gunblast.com/Freedom-Harton327.htm
This got me intrigued. Turns out, the loads are all well over max.
His 100gr XTP was loaded with 16.5gr of H110. Hodgdon's max is 13.2. His 100gr XTP with AA#9 was loaded with 14gr. Accurate states 13.0 as max.
In one of his other articles about the 327 which resulted in simlar chronograph results, he stated
"My best handload performance was loaded using Hodgdon H110 powder, and equaled and exceeded the performance of the factory ammunition. However, my powder charges exceed those listed by Hodgdon, so they are not recommended, and will not be published here. "
--apparently he changed his mind about publishing the numbers.
What does all this mean? Not all *that* much. The factory loads are still not too shabby. The 115gr factory load did 1,578fps from a 6.5" barrel, 1,462fps from a 5.5". Which is still quite respectable. I just thought it was worth mentioning that those eye-popping 100gr @ 1,700fps loads might require a walk on the wild side...
The other thing that's interesting is that he had to go 3.5gr over max
with H110 in order to just squeak by the factory 100gr load:
AE 100gr Factory Load, 1,579/1,649 (5.5"/6.5")
100gr XTP with 16.5gr H110: 1,604/1,707.