VV N-170 or N-560 in 7mm Dakota & 7mm Rem Mag?

E

elmer deer

Beginner
Jun 30, 2006
28
0
I am looking for loads in these 2 calibers with Vihtavuouri powders shooting bullets of 160grs,& 180grs and for the Dakota
200 grs wildacts. I would like the powder which gives the highest speed. Is n-170 slower than n-560? I am now using rl-25 and I am getting great speeds for my 7mm rem mag,the 160gr accubonds give 3077fps, Will the vv powders give me that speed and which one is as slow as rl-25, any experience with these powders is welcome.
Thanks
Elmerdeer
 
You can get the free Vihta loading guide at this link:

http://www.lapua.com/index.php?id=850

Look for the download section on the right hand side of the screen. It has some pretty good descriptions of each powder (with comparable mainstream US powders listed) and a good bit of load data. I don't know about the Dakota, but the RemMag is certainly in there. Hornady has Dakota data in their #7 manual, but I don't know what powders they list for it, as I'm not looking at it right now.
 
elmer deer":3hs6p5w9 said:
I am looking for loads in these 2 calibers with Vihtavuouri powders shooting bullets of 160grs,& 180grs and for the Dakota
200 grs wildacts. I would like the powder which gives the highest speed. Is n-170 slower than n-560? I am now using rl-25 and I am getting great speeds for my 7mm rem mag,the 160gr accubonds give 3077fps, Will the vv powders give me that speed and which one is as slow as rl-25, any experience with these powders is welcome.
Thanks
Elmerdeer
Click to expand...

Cartridge : 7 mm Rem. Mag.
Bullet : .284, 160, Nosler AccuBond 54932
Cartridge O.A.L. L6: 3.290 inch or 83.57 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Vihtavuori N560

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 78 52.80 2384 2019 30051 10604 88.1 1.631
-18.0 79 54.12 2445 2124 32065 10973 89.5 1.590
-16.0 81 55.44 2507 2232 34215 11332 90.9 1.549
-14.0 83 56.76 2568 2343 36512 11680 92.1 1.510
-12.0 85 58.08 2630 2458 38964 12016 93.3 1.465
-10.0 87 59.40 2692 2575 41587 12338 94.4 1.420
-08.0 89 60.72 2754 2695 44391 12645 95.4 1.377
-06.0 91 62.04 2816 2818 47392 12935 96.3 1.335
-04.0 93 63.36 2878 2943 50591 13207 97.1 1.295
-02.0 95 64.68 2940 3071 53980 13459 97.8 1.257 ! Near Maximum !
+00.0 97 66.00 3002 3201 57591 13691 98.5 1.220 ! Near Maximum !
+02.0 99 67.32 3063 3333 61445 13900 99.0 1.183 ! Near Maximum !
+04.0 101 68.64 3124 3468 65563 14086 99.4 1.149 !DANGEROUS LOAD-DO NOT USE!
+06.0 103 69.96 3185 3604 69965 14247 99.7 1.116 !DANGEROUS LOAD-DO NOT USE!
+08.0 105 71.28 3246 3742 74674 14382 99.9 1.083 !DANGEROUS LOAD-DO NOT USE!
+10.0 107 72.60 3306 3882 79718 14491 100.0 1.052 !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 97 66.00 3150 3526 69590 13381 100.0 1.124 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 66.00 2799 2784 46133 13216 92.1 1.344


Cartridge : 7 mm Rem. Mag.
Bullet : .284, 160, Nosler AccuBond 54932
Cartridge O.A.L. L6: 3.290 inch or 83.57 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Vihtavuori N170

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 85 56.00 2199 1718 26967 9139 79.0 1.741
-18.0 87 57.40 2259 1813 28807 9496 80.6 1.695
-16.0 89 58.80 2319 1911 30774 9852 82.1 1.650
-14.0 91 60.20 2380 2013 32885 10204 83.6 1.607
-12.0 93 61.60 2442 2118 35148 10551 85.1 1.565
-10.0 96 63.00 2504 2227 37578 10893 86.5 1.520
-08.0 98 64.40 2566 2340 40185 11228 87.9 1.471
-06.0 100 65.80 2629 2456 42986 11554 89.2 1.424
-04.0 102 67.20 2693 2576 45997 11871 90.4 1.378
-02.0 104 68.60 2757 2700 49236 12176 91.6 1.334
+00.0 106 70.00 2821 2827 52724 12469 92.7 1.291
+02.0 108 71.40 2886 2958 56484 12748 93.8 1.250 ! Near Maximum !
+04.0 110 72.80 2951 3093 60543 13012 94.8 1.210 ! Near Maximum !
+06.0 113 74.20 3016 3231 64931 13259 95.7 1.171 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 75.60 3082 3374 69683 13487 96.5 1.134 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 77.00 3148 3520 74838 13695 97.3 1.098 !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 106 70.00 2991 3179 63575 12828 98.1 1.186 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 70.00 2610 2421 42386 11551 84.0 1.428



Cartridge : 7 mm Dakota
Bullet : .284, 160, Nosler AccuBond 54932
Cartridge O.A.L. L6: 3.330 inch or 84.58 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Vihtavuori N170

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 85 62.40 2346 1955 30690 10529 83.4 1.673
-18.0 88 63.96 2410 2063 32833 10918 84.9 1.629
-16.0 90 65.52 2473 2174 35130 11302 86.4 1.585
-14.0 92 67.08 2538 2288 37591 11679 87.8 1.538
-12.0 94 68.64 2603 2407 40229 12047 89.2 1.488
-10.0 96 70.20 2668 2529 43059 12405 90.5 1.439
-08.0 98 71.76 2734 2655 46095 12751 91.7 1.392
-06.0 100 73.32 2800 2784 49355 13085 92.9 1.346
-04.0 103 74.88 2866 2918 52858 13403 93.9 1.303 ! Near Maximum !
-02.0 105 76.44 2932 3055 56627 13705 94.9 1.261 ! Near Maximum !
+00.0 107 78.00 2999 3195 60685 13989 95.9 1.220 !DANGEROUS LOAD-DO NOT USE!
+02.0 109 79.56 3066 3340 65060 14253 96.7 1.181 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 81.12 3133 3487 69783 14496 97.5 1.143 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 82.68 3200 3639 74891 14715 98.1 1.106 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 84.24 3268 3794 80425 14909 98.7 1.070 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 85.80 3335 3952 86431 15077 99.2 1.036 !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 107 78.00 3161 3550 72646 14088 99.5 1.123 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 78.00 2791 2768 49110 13226 88.4 1.346



Cartridge : 7 mm Dakota
Bullet : .284, 160, Nosler AccuBond 54932
Cartridge O.A.L. L6: 3.330 inch or 84.58 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Vihtavuori N560

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 74 56.00 2412 2067 30128 11299 89.3 1.650
-18.0 76 57.40 2473 2173 32120 11683 90.6 1.609
-16.0 78 58.80 2534 2281 34242 12057 91.9 1.569
-14.0 80 60.20 2595 2393 36504 12420 93.1 1.531
-12.0 82 61.60 2656 2507 38916 12769 94.2 1.486
-10.0 84 63.00 2717 2624 41473 13103 95.2 1.442
-08.0 85 64.40 2779 2743 44163 13421 96.1 1.399
-06.0 87 65.80 2840 2865 47011 13722 97.0 1.358
-04.0 89 67.20 2900 2989 50034 14003 97.7 1.318
-02.0 91 68.60 2961 3115 53243 14264 98.3 1.280 ! Near Maximum !
+00.0 93 70.00 3021 3243 56651 14503 98.9 1.243 ! Near Maximum !
+02.0 95 71.40 3082 3374 60272 14718 99.3 1.208 !DANGEROUS LOAD-DO NOT USE!
+04.0 97 72.80 3141 3506 64119 14910 99.6 1.173 !DANGEROUS LOAD-DO NOT USE!
+06.0 98 74.20 3201 3640 68211 15077 99.9 1.140 !DANGEROUS LOAD-DO NOT USE!
+08.0 100 75.60 3260 3775 72564 15217 100.0 1.108 !DANGEROUS LOAD-DO NOT USE!
+10.0 102 77.00 3318 3911 77199 15331 100.0 1.078 !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 93 70.00 3166 3561 67973 14140 100.0 1.146 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 93 70.00 2823 2832 45573 14065 93.0 1.370
 
Sorry I can't be of help on those two powders... I use a lot of N-165 & N-140. good consistent powerders and burn very clean.
 
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