IMHO..
Some old straight wall cartridges get made a little longer and get registered at a higher pressure.
They made a mistake with the 32 H&R mag, in that it failed to take advantage of how high the pressure could be and still not get stuck cases. To exploit that margin, the case had to be lengthened and the pressure upped a second time to the 327 Fed Mag.
Revolvers with a 6 at once extractor can get stuck cases at ~ 40,000 psi, depending on the thickness of the steel chamber wall:
38 special -> 357 mag
44 special -> 44 mag
45 Colt -> 454 Casull
32 S&W long -> 32 H&R mag -> 327 Fed Mag
I buy 100 year old Colt 32 S&W long revolvers and load them until the cases stick and then back off a safety margin.
I like 800X and LIL'GUN for the 32 S&W Long.
One problem I have had is blown out forcing cones in the old Colts.
The barrel is unscrewed, the forcing cone TIG welded up, and then re cut with a thicker profile.
The hot loads then proceed without incident.
John Bercovitz explaining the math of sticky revolver cases in 1993 
