Vv n-170

Discussion in 'Reloading' started by Freebore, Jan 27, 2010.

  1. Freebore

    Freebore Well-Known Member

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    614
    Joined:
    Oct 23, 2002
    I was able to pick-up a 2# jug of this cheap. I have and do use N-160 and N-165. Just did a search and figured from conversation it is comparable to RL-25.

    Looking for info on this N-170 powder of folks who could be using it in the following:

    257 Weatherby Mark V w/115-120 bullet Weatherby (Norma) cases

    308 Hammonds Custom Rem 700 (30/8mag) w/180-220 bullets Rem cases

    Weatherby Mark V 7STW w/160 -175 bullets WW/Fed cases

    Any input or data would be appreciated.
     
  2. brianwinzor

    brianwinzor Well-Known Member

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    201
    Joined:
    Jan 31, 2003
    I have used Viht N170 in a .224 Clark, 25/06AI, and 257W, and found that it has a similar or marginally slower burning rate to our ADI 2225 which is sold as HRetumbo in the US. I have included some chrono data below as an example of the above:

    25/06AI
    Nosler 115 grain BT
    Viht N170
    62.0 - 3165
    63.0 - 3202
    64.0 - 3286 (Near Max, slightly compressed load)

    Viht N165
    59.0 - 3305 (Max)

    Wildcat 125 grain ULD
    Viht N170
    64.0 - 3139 (Max)

    ADI 2225
    63.0 - 3120 (Max

    Wildcat 130 grain FBBCHP
    Viht N170
    61.0 - 2969 (Mild)

    Wildcat 142 grain ULD
    Viht N170
    61.0 - 2945
    62.0 - 3020 (Max)

    ADI 2225 (HRetumbo)
    61.0 - 2986
    62.0 - 3039 (Max)

    Wildcat 156 ULD
    Viht N170
    58.0 - 2773
    59.0 - 2820 (Max)

    ADI 2225
    57.0 - 2782
    58.0 - 2810 (Max)


    .257 Weatherby (no freebore)
    Nosler 100 BT
    Viht N170
    77.0 - 3592 (Max)

    ADI 2225
    76.0 - 3561 (Max)

    Wildcat 156 ULD
    Viht N170
    63.0 - 2791 (Near Max)

    ADI 2225
    62.0 - 2820 (Max)


    .224 Clark
    100 grain Little BTHP
    Viht N170
    51.0 - 3120 (Max)

    ADI 2225
    50.0 - 3091 (Max)

    Hope that the above is of some help. Regards, Brian.
     
  3. Freebore

    Freebore Well-Known Member

    Messages:
    614
    Joined:
    Oct 23, 2002
    brianwinzor,

    Thanks for the shared data. I am curios to see how well it does with the 115 bal-tips as I really like this bullet in the 257W and use H-1000 now. I am surprised to see that you could get the 100 grain close to 3600fps with this powder, but as you stated you have not the 'Freebore'. I use RL-22 with the 100 grainers which many have said it is the floor sweeping from making MRP powder.
    N-170 looks like it does very well for you with the heavy Wildcats and 25-06AI. My son is shooting a stock 25-06 with 117's and he told we to leave it alone, he likes what he has now. Planning to take him on his first trip out west this year pending my elk draw. Have a good day.
     
  4. brianwinzor

    brianwinzor Well-Known Member

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    Joined:
    Jan 31, 2003
    Kevin,

    I see no reason why Viht N170 would not work well with the Nosler 115BT in your 257W, and is definitely worth trying. It would also be worth trying in your 7mm STW, and 30/8mm Mag with the bullet weights you mentioned.

    About 10 months ago I tried it with the Nosler 115 BT in my 257W, and it gave average to good accuracy (0.5 - 0.75 moa). Unfortunately my CED Chrono decided it was then too late in the day to give any more readings. Earlier in the day I had recorded with this bullet weight:
    78.0 grains H870 - 3338 (Max)
    79.0 grains AR2218 - 3291 (Near Max)

    About 1 week later I loaded up some cases using the Nosler 115 BT, to chronograph and compare the performance of Viht N170 and Viht N570. I also had some loads using the Nosler 100 BT with IMR 7828, and Re 22. Unfortunately I never got to test them, as several days later my house was broken into, and the .224 Clark, 25/06AI, and 257W rifles were stolen, and as yet not recovered.

    Good luck with your testing and hunting. Regards, Brian.