357Magnum Precision Made Cartridges (PMC) 150gr Starfire SFJHP Pull-Down

[The_Shadow]

Cartridge is from Ammo Manufacture:Precision Made Cartridges (PMC) 150gr Starfire SFJHP
Ballistics Information: 357 Magnum
Muzzle Velocity: 1205 fps (Starfire data shows)
Muzzle Energy: 484 ft. lbs
Pictures: Before/After disassembly:
Brass Make/Headstamp: PMC - Brass
Bullet Make/Weight/Construction/Info; Length 0.6400"/Dia. 0.3560":  150gr. Starfire JHP
Actual weigh 150.0 grains  Cannelure Diameter 0.3525" 
HP Dia 0.0990" segmented pleats  HP Depth 0.1920" Mouth 0.1945"
C.O.A.L.: 1.5760"
Primer: Brass color
Case: Diameter 0.3755" Crimp Diameter 0.3750" Length 1.2830"
Powder Description/Positive ID/Type/Charge Weight: H-110/W 296  13.6 grains
Tested in the S&W model 19 6" 1575 fps /1518 fps June 8, 2013
Case expanded to 0.3825", primer slightly flattened, case look good.

[REDLINE]

Looks like a good load for an SP101.

[Intercooler]

I wonder what it will do in my 6" GP100 when I pick it up? Raggedyman has these for gel and it will be interesting!

[The_Shadow]

I made a change to the powder as further review I think it is H-110/W 296 

[DM1906]

I made a change to the powder as further review I think it is H-110/W 296

Not too sure about that, for a few reasons.

While the charge weight is close to W296/H110 performance, the powder doesn't appear like either of my old W296, or new H110.  Your pictured granules appear larger than the 13.6 gr. I trickled into my RCBS scale pan, the granules are too smooth and spherical, and the charge results in about an 80% case fill (big NO-NO with these powders).  Unless this was a accidental "light" charge (which can result in a squib), I don't think it's W296/H110.  It would about the least efficient powder (economy and performance) for this bullet weight and velocity.  It's a fairly anemic .357, in any case.  PMC's website advertises 1350/607 (muzzle), , which is more inline with common factory loadings for similar bullet weight and design.  About 15+ gr. W296/H110 would be more likely to achieve the advertised 1350 FPS.

[The_Shadow]

Those were my reasons at first, but I found a chart for the PMC performance specs.  The velocities were too low for the charge weight of the #9 but a reduced charge of H-110/W 296 @ 13.6 grains would place it in the right range...