Sierra Sports Master JHP 135grs

[rockwilder]

Hi,
I am trying to find some load data for the Sierra Sports Master JHP 135grs.
I want to use Vihtavuori N350 for strong loads. It would be nice to find an other load with HP-38 (I know it is fast) just for training.

Right now I am thinking of 7grs HP 38 with an OAL of 32mm / 1,26"
But I have no idea of how much N350 I should use.
Best regards and thank you for your support,
Rock

[Ramjet]

The Lee book has several loads listed for the 135 grain.

Starting.                  Max.                       Powder.                 Pressure at max           
10.3 grains              11.4. gr                Accurate no.5.           36900
7.2.  gr                      8.0 gr.                Title group                35800
7.0.  gr.                     8.0 gr.                 Universal.                 36100
10.0 gr.                     11.2 gr.                HS-6.                       36900


The Universal looks like a nice light load posting velocities from 1284-1460 FPS the problem with the lee book is no barrel length is posted.

[The_Shadow]

These are VV loads for the 155 grain you could load the 135's using this data and even work up some

10 MM AUTO
Test barrel: 140 mm (5½"), 1 in 16" twist
Primers: Large Pistol
Cases: Remington, trim-to length 25,00 mm (0.988")

Bullet   10,0 g / 155 gr   FP, Rainier   C.O.L. 31,9 mm / 1.256 inch

Powder   Starting load   Maximum load
Type   Weight   Velocity   Weight   Velocity
   [g]   [grs]   [m/s]   [fps]   [g]   [grs]   [m/s]   [fps]
N340   0,45   6.9   369   1211   0,50   7.6   386   1266
N350   0,49   7.6   379   1243   0,55   8.5   400   1311
3N37   0,51   7.8   373   1224   0,56   8.6   392   1284

Bullet   10,0 g / 155 gr   HP-XTP, Hornady   C.O.L. 31,9 mm / 1.256 inch

Powder   Starting load   Maximum load
Type   Weight   Velocity   Weight   Velocity
   [g]   [grs]   [m/s]   [fps]   [g]   [grs]   [m/s]   [fps]
N340   0,40   6.2   355   1165   0,46   7.1   374   1225
N350   0,42   6.4   359   1178   0,51   7.8   380   1247
3N37   0,43   6.6   359   1178   0,52   7.9   380   1247

VV also shows the 40 S&W using 135 gr XTP (you could work up from these and watch for pressure signs)
Powder  gram grain M/s fps    gram  grain M/s fps
N350   0,43    6.6   351 1152   0,45 7.0 362 1189

I wish I had more specific data for you with 10mm using the 135 grain bullets (I'll keep looking)

[The_Shadow]

Here is some older data for VV powder

[rockwilder]

Thank you guys for the data.
This is what I have done so far. The 180grs bullet is lead with a thin copper coating.

I think will will start with 8,5grs N350 behind the 135grs, good choice?
And a 170grs FMJ TC from PPU should be ok with 7,5grs, right? All with the max OAL of 1,26"

[attachment deleted by admin]

[The_Shadow]

rockwilder for your plated 180 grain 10mm if I have read the data correctly yo show an average velocity of 361 Meters per second, which would be 1184 feet per second.  Not bad at all!

It looks like you were using the 180 grain bullet over 7.3 grains of VV N350 powder with CCI 300 primers, It looks like you were shooting from a 150mm barrel or about 5.9"...
Highest velocity 371 M/S or 1217 fps
Lowest velocity 355 M/S or 1164 fps

These are respectable numbers and track with the info for the 180 grain HP in the chart I posted above! 

It will be interesting to see how the 135 grain bullets work for your testing!  Please come back and add you test results. 

[rockwilder]

Hi, I have the new results from a proof house here in Germay.

https://we.tl/t-MebdmJM0Vh

Please comment my results. Best regards Rock

[5pins]

The Sierra App shows 10.2gr of N350 with a velocity 1560fps. No data with HP38.