Modern 32 S&W Long and/or 32 Colt New Police ammo is perfectly safe to shoot in a 32 Long S&W HE revolver.
Here's a test I did recently using my 1952 Colt Detective Special in 32 Colt NP caliber. I would assume all ballistic figures for this ammo and most others is generally done with barrels of 4 inches or longer. My test gun has a 2 inch barrel, so aside from advertising claims that could be a tad ambitious, using a barrel half the length of a test barrel would affect the figures the manufacturers claim.
I posted the results at the Coltforum originally.
"Range Report - Sellier & Bellot 32 Colt New Police/32 S&W Long & Rem. 32 S&W Long
My friend with the chronograph & I finally got to the range today to clock the two 32 long loads I found to shoot in my 1952 Colt Detective Special 32 Colt New Police revolver. See this thread for some background:
Fed Personal Defense 32 S&W Long ammo any better?
Here's the results for a 5 shot group of Remington 98 gr. and a 5 shot group of Sellier & Bellot 100 gr.
Remington 98 gr. lead round nose
Muzzle Velocity/ Ft. Lbs. Energy
652 f.p.s./ 93 ft.lbs.
689 f.p.s./ 103 ft.lbs.
678 f.p.s./ 100 ft.lbs.
677 f.p.s./ 100 ft.lbs.
703 f.p.s./ 108 ft.lb.s
Average muzzle velocity (5 shots) - 680 f.p.s.
Average foot lbs. of energy (5 shots) - 101 ft.lbs.
Sellier & Bellot 100 gr. lead flat point (round nose)
Muzzle Velocity/ Ft. Lbs. Energy
763 f.p.s./ 129 ft.lbs.
798 f.p.s./ 141 ft.lbs.
766 f.p.s./ 130 ft.lbs.
804 f.p.s./ 144 ft.lbs.
846 f.p.s./ 159 ft.lbs.
Average muzzle velocity (5 shots) - 795 f.p.s.
Average foot lbs. of energy (5 shots) - 140 ft.lbs.
I did some informal researching in various older reloading manuals that were hand-me-downs from my friend, including Speer, Hornady, etc., and the tables in the classic Smith's "Pistols and Revolvers of the World". The average/standard listing for the classic 32 Colt New Police and the identical S&W 32 Long rounds with 98 gr. bullets are 705 f.p.s. delivering 108 ft.lbs. of energy. Pretty anemic.
The S&B round was the highest velocity and ft.lbs. advertised anywhere on the internet compared to Remington, Winchester, Magtech, etc. The 2nd hotest performing brand advertised was the Magtech which one of our members recommended, but I did not purchase any of it.
Neither the Remington or the Sellier & Bellot shot quite as fast or delivered quite as much energy as they advertised at (which I expected). The Remington advertised at 705 f.p.s. and 115 ft. lbs. The Sellier & Bellot advertised at 886 f.p.s. and 174 ft.lbs. I expected both brands would chrono at a little less than advertised claims. My main interest in doing these tests were to see if the S&B ammo came close to their claims because the f.p.s. and ft.lbs. they claimed made the round a little more viable as a close range self defense rd. to me. After all, standard 38 Special goes at about 780 f.p.s. and gets about 195 ft.lbs. But, the 38 Special does have an advantage in a larger cross sectional density.
I am happy to report that the Sellier & Bellot ammo is indeed much "hotter" than any other brand's advertised claims, and is a better self defense round in this loading than the other ammo makers offer.
The figures I reported from the S&B ammo are definitely higher enough compared to the standard offerings citing well established averages for this old chambering. Therefore, to me it is worth buying instead of Remington, Winchester, etc. I initially ordered two boxes of 50 rds. I think I will order two more to make sure I have a good supply of it. It also has the added feature of having a flat nose for Colt fans instead of the round nose profile of the S&W 32 long lead round nose that everybody else makes. But that adds nothing to performance, of course.
Tenths of decimals were rounded off from f.p.s. and ft.lbs. of energy for this casual report."
As far as I can tell, neither the Remington 32 Long or the S&B loading had any adverse effects on the D.S. There was no signs of heavy leading, either. Both brands were actually very clean. I don't really know if I'd trust a 32 Long as a self defense carry round, but it's gratifying to know there are a few loadings available that perform better than the historical ballistics provided for this cartridge. Magtech also makes a 32 Long HP loading that advertises as above the standard FPS and Ft. Lbs. of Energy for the 32 Long cartridge. I don't think a hollow point bullet would actually expand given the cartridges ballistics and using short barrels. Ideally, I'd use LSW or the ubiquitous round nose bullets in this cartridge.