H1000 in the 7mm WSM

[Tyler Kemp]

Quickload says I can get 3100+ fps with H1000 and 180 Bergers in the 7mm WSM. Has anyone tried this combo?

 

[geargrinder]

Quickload says I can get 3100+ fps with H1000 and 180 Bergers in the 7mm WSM. Has anyone tried this combo?

You might want to check it again. You'd be over max.




I copied this from another thread.

Cartridge : 7 mm WSM
Bullet : .284, 180, Berger VLD
Cartridge O.A.L. L6: 2.860 inch or 72.64 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : Hodgdon H1000

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 81 52.00 2225 1978 27272 8824 90.3 1.866
-18.0 83 53.30 2283 2083 29108 9124 91.7 1.817
-16.0 85 54.60 2342 2192 31073 9413 93.1 1.769
-14.0 88 55.90 2401 2304 33177 9689 94.3 1.722
-12.0 90 57.20 2460 2419 35434 9950 95.4 1.676
-10.0 92 58.50 2519 2537 37855 10195 96.4 1.629
-08.0 94 59.80 2579 2658 40455 10421 97.3 1.576
-06.0 96 61.10 2638 2781 43252 10628 98.1 1.528
-04.0 98 62.40 2697 2908 46260 10814 98.7 1.480
-02.0 100 63.70 2756 3037 49499 10977 99.2 1.434
+00.0 102 65.00 2815 3168 52994 11116 99.6 1.390
+02.0 104 66.30 2874 3301 56769 11231 99.9 1.347 ! Near Maximum !
+04.0 106 67.60 2932 3437 60854 11319 100.0 1.306 ! Near Maximum !
+06.0 108 68.90 2990 3574 65276 11384 100.0 1.266 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 70.20 3048 3713 70078 11442 100.0 1.227 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 71.50 3105 3853 75300 11496 100.0 1.189 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 102 65.00 2948 3473 64721 10649 100.0 1.281 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 65.00 2624 2752 42914 10952 94.3 1.530

 

[Tyler Kemp]

I forgot to say, 30" barrel and Bergers seated real long. I think it said 73.8 grains?

 

[Tyler Kemp]

3106fps 73.2gr H1000 104% density 64383psi COL 3.341"

 

[JeffVN]

I run H1000 in my 7WSM; they are long throated to 3.160." I run a good/great target load at 66.3 grains and get 2,920+ fps out of it.

3100 is not possible under safe condition where I live.

3,000 fps is doable in a 30" tube, I suspect 3,100 is not.

JeffVN

 

[WAMBO]

Tyler,

I agree with JeffVN that 3000fps is doable but not 3100fps safely.
There was a guy who shot 1000yd BR here in Tucson and he shot a 7WSM with the 180 Berger/30"barrel and his velocity was 3025fps and he stated that the load was hot!
I shoot a 27" Broughton 5C barrel on my 7WSM using the 175 SMK over 67grs of H1000, I get just over 3000fps and that's a max load in my rifle.
The 180 Berger has a slightly longer bearing surface than the 175 SMK so I know if I tried the Berger in my rifle it would be less than 3000fps safely, I don't think a 3" longer barrel would add much more than 50fps.
Also to load a 180 Berger in a 7WSM at 3.341" COAL you would have less than .100" of the bullet shank in the neck of the case so that wouldn't be too good.

Regards,
Wayne aka WAMBO