Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

7RUM & Vv N170

 
LinkBack Thread Tools Display Modes
  #1  
Old 12-29-2011, 09:29 PM
Gold Member
 
Join Date: Oct 2002
Location: York, Pa.
Posts: 593
7RUM & Vv N170

Anybody using N170 in the 7RUM? I cannot find any data to even start with. I've ran out of Retumbo & 160 Accubonds and have 2# of this 170. I have 162 A-max moly, 168 SMK, 154 SST's, and 175 Spitzers Even QuickLoad data would help. Rifle is a 700LSS stock. Any help much appreciated.
__________________
Kevin
Reply With Quote
  #2  
Old 12-30-2011, 09:58 PM
Silver Member
 
Join Date: Jan 2003
Location: Wallaroo, South Australia
Posts: 201
Re: 7RUM & Vv N170

I do not own a 7mm RUM so I cannot give you data for that cartridge.

However, I have used Viht N170 in a 25/06AI, 257Weatherby, and 300 RUM. I have found that my lot of Viht N170 is virtually identical in burning rate in the above cartrideges to AR2225 (H Retumbo in USA)

In my Rem 700 300 RUM (similar case capacity to 7mm RUM) using Remington Cases, and Federal 215 primer:
180 grain Nosler BT
100.0 grains AR 2225 - 3289 (Max)
100.0 grains Viht N170- 3292 (Max)
100.0 grains Viht N570 - 3313 Max)

I suggest that when using Vihtavouri N170 you start about 10 % below your Hodgdon Retumbo maximum loads that you used previously in your 7mm RUM and work up from there.

Hope that the above is of some help. Regards, Brian
Reply With Quote
  #3  
Old 12-30-2011, 10:20 PM
Gold Member
 
Join Date: Oct 2002
Location: York, Pa.
Posts: 593
Re: 7RUM & Vv N170

brianwizor
Thanks for your data. I do have a 257 Weatherby I can try it in. What bullet/charge are you using in the 257?

I'll load some of the N170 in the RUM starting where you suggested with the 168's and work up. Retumbo maxes out in the 92/93 range with 160's in my rifle.
__________________
Kevin
Reply With Quote
  #4  
Old 12-30-2011, 10:54 PM
Silver Member
 
Join Date: Jan 2003
Location: Wallaroo, South Australia
Posts: 201
Re: 7RUM & Vv N170

Sadly I no longer own a 257W, as my .257W, 25-06AI, and .224 Clark were stolen about 2 years ago.

However, I still have the chrono data that I worked up in my Custom 257W, with REM 700, and Krieger 26 inch 1 in 7 twist barrel. (no freebore)

Using Norma 257W cases, Federal 215 primer
Nosler 100 grain BT
72.0 AR 2225 - 3347 (Mild)
76.0 AR2225 - 3561 (Max)
72.0 Viht N570 - 3286 (Mild)
75.0 Viht N570 - 3607 (Max)
82.0 H 870 - 3553 (Max)

I did not try Viht N170 with the 100 grain BT, but as you can see I tried Viht N570 and AR2225 which should give you a clue. I did use Viht N170 with the Wildcat 156 grain ULD.

Wildcat 156 grain ULD
64.0 AR2225 - 2831 (Max)
64.0 Viht N170 - 2841 (Max)
69.0 H870 - 2881 (Max)
70.0 AR2218 (H50BMG in US) - 2872 (Max)

Good Luck, Brian.
Reply With Quote
  #5  
Old 01-04-2012, 09:56 PM
Platinum Member
 
Join Date: Jan 2010
Location: Leominster mass, originally Salisbury Maryland
Posts: 1,324
Re: 7RUM & Vv N170

Freebore, I have 4pounds of this powder and tried it in my 7RUM. I tried 91 grains and a 140 nosler ct bullet. I did not have have my chronograph at that time, but I don't think the velocity was not that much. Recoil as lite, but the muzzle blast was ferocious! I think it will be useful with heavy bullets, versus lite 140's. I will eventually try some 160's and will revisit it. I am told that if you use Retumbo charge weighs and work up slowly, the results should be OK.I have the powder from a .338 Lapua project a few years ago. It seems to like to be lite with WLRM primers. When I got this rifle, I was hoping to utilize it. Will do more testing. I think it is a usable powder given the case capacity, and the right weight bullet. AIM SMALL,MISS SMALL 7STW
Reply With Quote
  #6  
Old 01-04-2012, 11:11 PM
Gold Member
 
Join Date: Oct 2002
Location: York, Pa.
Posts: 593
Re: 7RUM & Vv N170

7STW,

I have an Accumark in 7STW to push those 140s'. I got this RUM 'cause I was the only one the guys knew who was LH when a comrade passed who had one. Talked me right into it. It's a Rem 700LSS and it's a cannon and it takes whole lot of powder.
Trying to find a good load for this thing with what I have on the shelf just figured somebody might be shooting this VV powder. And I thought the STW case was big! I haven't seen anything that the 7STW won't do really.
I agree I think the 140 are not the way to go but 160's and upward should work. Planning to go to range in am. Thanks for the reply.
__________________
Kevin
Reply With Quote
  #7  
Old 01-05-2012, 07:04 PM
Platinum Member
 
Join Date: Jan 2010
Location: Leominster mass, originally Salisbury Maryland
Posts: 1,324
Re: 7RUM & Vv N170

Freebore, what are you shooting in your STW? If you are shooting RL22 or 7828' that stuff stuff works in the rum as well, with 140's, but when you approach 3400' you have to be careful if the weather warms up. I am getting 3406 with 6 fps spread. I am shooting Hornady 140 Interbonds. Powder charge is 88.4, RL22. The 7828 load is the same, velocity is 3360 ish. Just wanted to let you know in case you have these powders on hand. ( assuming you use it in your STW) AIM SMALL, MISS SMALL 7STW.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 7RUM & Vv N170
Thread Thread Starter Forum Replies Last Post
7RUM 1/12 help Limbic Reloading 3 08-09-2010 08:58 AM
7mm STW with 180gr Berger and vv N170? harald70 Reloading 3 07-24-2010 12:47 AM
vihtavuori N170 v N570 sniperboy Reloading 3 01-13-2010 10:01 PM
N170 in 338lapua imp? 7mmrowland Reloading 3 08-16-2009 02:29 PM
N170 in the 264 win mag su37 Reloading 3 01-23-2007 10:45 AM


All times are GMT -5. The time now is 04:50 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC