rumshooter
Beginner
- Apr 30, 2005
- 26
- 0
Where might one find starting load data for the 150 gr. E -Tip and the 7mm WSM with Magpro powder ?
7mm E-TIP
- Thread starter rumshooter
- Start date
- Oct 30, 2004
- 24,184
- 2,823
The only advise I can offer is................
StarT at minimum....work up slow .............
this is only a simulation!!!!!!!
YMMV
Cartridge : 7 mm WSM
Bullet : .284, 150, Nosler E-Tip
Cartridge O.A.L. L6: 2.860 inch or 72.64 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Accurate MAGPRO
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 80 56.00 2506 2092 33827 10437 87.0 1.497
-18.0 82 57.40 2569 2198 35990 10792 88.4 1.460
-16.0 84 58.80 2633 2309 38314 11139 89.7 1.424
-14.0 86 60.20 2697 2423 40810 11478 90.9 1.389
-12.0 88 61.60 2761 2540 43496 11807 92.1 1.354
-10.0 90 63.00 2826 2661 46386 12123 93.2 1.320
-08.0 92 64.40 2892 2785 49481 12426 94.3 1.287
-06.0 94 65.80 2957 2913 52775 12713 95.3 1.254
-04.0 96 67.20 3023 3044 56286 12983 96.2 1.221 ! Near Maximum !
-02.0 98 68.60 3089 3178 60049 13235 97.0 1.190 ! Near Maximum !
+00.0 100 70.00 3155 3315 64101 13467 97.7 1.158 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 71.40 3221 3456 68468 13677 98.3 1.125 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 72.80 3287 3599 73181 13863 98.9 1.091 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 74.20 3354 3746 78271 14025 99.3 1.058 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 75.60 3420 3895 83778 14160 99.6 1.026 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 77.00 3486 4047 89747 14268 99.9 0.995 !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 100 70.00 3317 3665 77194 13259 100.0 1.070 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 70.00 2940 2878 51437 12918 90.8 1.254
StarT at minimum....work up slow .............
this is only a simulation!!!!!!!
YMMV
Cartridge : 7 mm WSM
Bullet : .284, 150, Nosler E-Tip
Cartridge O.A.L. L6: 2.860 inch or 72.64 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Accurate MAGPRO
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 80 56.00 2506 2092 33827 10437 87.0 1.497
-18.0 82 57.40 2569 2198 35990 10792 88.4 1.460
-16.0 84 58.80 2633 2309 38314 11139 89.7 1.424
-14.0 86 60.20 2697 2423 40810 11478 90.9 1.389
-12.0 88 61.60 2761 2540 43496 11807 92.1 1.354
-10.0 90 63.00 2826 2661 46386 12123 93.2 1.320
-08.0 92 64.40 2892 2785 49481 12426 94.3 1.287
-06.0 94 65.80 2957 2913 52775 12713 95.3 1.254
-04.0 96 67.20 3023 3044 56286 12983 96.2 1.221 ! Near Maximum !
-02.0 98 68.60 3089 3178 60049 13235 97.0 1.190 ! Near Maximum !
+00.0 100 70.00 3155 3315 64101 13467 97.7 1.158 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 71.40 3221 3456 68468 13677 98.3 1.125 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 72.80 3287 3599 73181 13863 98.9 1.091 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 74.20 3354 3746 78271 14025 99.3 1.058 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 75.60 3420 3895 83778 14160 99.6 1.026 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 77.00 3486 4047 89747 14268 99.9 0.995 !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 100 70.00 3317 3665 77194 13259 100.0 1.070 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 70.00 2940 2878 51437 12918 90.8 1.254
Big Squeeze
Handloader
- May 29, 2007
- 828
- 0
...........................In the V Edition of my Sierra manual, it shows the following;rumshooter":3jk7vujc said:
7 WSM
Winchester M/70
24" bbl
1 in 9 1/4" twist
Trim to length- 2.090"
Primer- WLRM
150 gr. Sierra SBT
MagPro powder
64.8 gr @ 2800 fps.
67.0 gr @ 2900 fps.
69.2 gr @ 3000 fps.
71.4 gr @ 3100 fps.
72.5 gr @ 3150 fps. (max)
G
Guest
Guest
Having loaded some E-Tips in .27 and .308, I'll caution you not to use existing data with regard to max charges. I reached max pressure well before max published charges in two different rifles. My results were very consistent as to what percentage below max, as well. I'd start with the simulation POP provided, go up in very small increments (like .5gr or less) and be aware of every possible sign of pressure. If you don't have a chronograph, get one for working up these bullets, as they behave markedly different than normal lead-core bullets of the same weight. I was able to achieve excellent velocity and accuracy by seating these with significant jump into the lands (rather than close seating them like many do with lead core bullets), but my velocities came at much lower charges (2-4gr in some instances) than with lead core bullets or TSX's of the same weight. I had the best results using a slow powder for the application, so you are probably looking at the right powder - MagPro is pretty slow stuff - just work up carefully.
- Nov 4, 2004
- 24,902
- 7,796
rumshooter
+1 to what dubyam said.
I have shot the 7mm 150 gr E-Tip in my 280 AI with RL 22. I started at min load and worked up to the mid level which is considered MAX by Nosler. I also achieved my best accuracy at .100" off the lands.
The 7mm 150 gr E-Tip shoots, yoou just have to find the sweet spot off the lands.
JD338
+1 to what dubyam said.
I have shot the 7mm 150 gr E-Tip in my 280 AI with RL 22. I started at min load and worked up to the mid level which is considered MAX by Nosler. I also achieved my best accuracy at .100" off the lands.
The 7mm 150 gr E-Tip shoots, yoou just have to find the sweet spot off the lands.
JD338
I just started loading these in a 7mm SAUM, initial accuracy has been excellent. I'm using H4831sc, I started at min, 58grs and worked uo to 60.8, the groups have all been sub MOA, several half that size.
Any idea what sort of velocities I should be getting here? I am shooting for 3000 fps.
What's the BC on this bullet?
Any idea what sort of velocities I should be getting here? I am shooting for 3000 fps.
What's the BC on this bullet?
- Oct 30, 2004
- 24,184
- 2,823
martinbns":2d4zhdag said:
Cartridge : 7 mm Rem SA Ultra Mag
Bullet : .284, 150, Nosler E-Tip
Cartridge O.A.L. L6: 2.825 inch or 71.76 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : Hodgdon H4831 SC
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 83 48.64 2345 1831 33811 9414 85.3 1.387
-18.0 85 49.86 2403 1923 35923 9740 86.6 1.354
-16.0 87 51.07 2461 2017 38184 10061 87.9 1.322
-14.0 89 52.29 2520 2115 40607 10376 89.2 1.291
-12.0 91 53.50 2579 2216 43205 10685 90.3 1.261
-10.0 93 54.72 2639 2320 45994 10986 91.5 1.230
-08.0 95 55.94 2700 2427 48991 11277 92.6 1.200
-06.0 97 57.15 2760 2538 52215 11558 93.6 1.171
-04.0 99 58.37 2822 2652 55687 11826 94.5 1.142 ! Near Maximum !
-02.0 101 59.58 2883 2769 59432 12082 95.4 1.113 ! Near Maximum !
+00.0 103 60.80 2945 2889 63477 12322 96.3 1.085 ! Near Maximum !
+02.0 105 62.02 3007 3012 67851 12546 97.0 1.058 !DANGEROUS LOAD-DO NOT USE!
+04.0 107 63.23 3070 3139 72591 12752 97.7 1.025 !DANGEROUS LOAD-DO NOT USE!
+06.0 109 64.45 3133 3269 77733 12939 98.3 0.994 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 65.66 3196 3402 83286 13105 98.8 0.964 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 66.88 3259 3538 89309 13248 99.2 0.934 !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 103 60.80 3092 3185 75290 12365 99.6 1.012 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 60.80 2757 2533 52467 11698 89.1 1.174
