Cartridge is from Ammo Manufacture:  Remington 357 Mag
Muzzle Velocity; Advertised:  1235 fps  4" barrel.
Actual Instrumental Velocity:   1266 fps 5" barrel;  36°F
Muzzle Energy; Advertised:   535 ft/lbs.




Brass Make/Head stamp:  Remington;  R-P 357 MAGNUM

Bullet Make/Weight/Construction/Info:  Remington 158gr JSP
.3565" dia.
.676" long.
Actual Weight:  158.6grs.







C.O.A.L.:   1.564"
Primer: Nickel;  Rem 5½

Case: Brass;
1.290" Long.
78.9grs. w/o primer



Powder Description/Positive ID/Type/Charge Weight: Flattened Ball;  H-110/296; 16.5grs.

Thanks for sharing the pull down, these matched the Winchester velocity and same load!   

I was told a couple of years back that Remington no longer makes their own components and ammo. First thing I noticed in this pull down is that the bullet is not the old Remington "buttercup" bullet of old. The jackets on the old Remington bullets were scalloped where the jacket meets the exposed lead. I still have a few thousand of them left. I'm not aware of any formulation changes with H110 and I find it kinda odd that they chose this particular load. That puts the load considerably under max pressure for the 357 mag. The old standby load for velocity and accuracy was always 17.0 grs H110 with the 158gr bullets and that was not a max load. Interesting results though. Thanks for sharing.

Interesting..
I've come to believe that major ammo makers, Rem, Win, Fed etc seem to be pulling back a bit on pressure in some factory loads, in particular .357 loads.  This might be because most of the revolvers being used today are smaller, shorter and lighter for caliber, as opposed to the N-Frames and Ruger Blackhawks we were shooting back in the day, so would be more difficult to handle with the more stout loads, for the average person anyway. Also some of these lighter framed guns can't handle a constant diet of stout old school factory loads. Even load data has been lightened up some from days of old.  IMR used to list 17.0grs as max for H-110/296 a few years ago, now they list 16.7.  I get pretty much identical velocities with 16.6grs of H-110/cci550 with this bullet as a loading component with this factory load.  As I don't really believe Rem is using canister grade powders, rather a non-canister grade St. Marks propellant having the same burning rate and velocity yield as canister H-110/296.. Just my opinion.
I've always marveled how much some of Remington rifle bullets look like Hornady bullets.