N560 and N570 and the 7mm RSAUM

[JLDavid]

I have never used the Vihtavouri line of powders for any cartridge. I am working on a 7mm RSAUM with 168 grain bullets. I would like to try N560 and/or N570 but I can't find any data. If anyone has a good place to start and what velocities I can expect, please let me know. So far Retumbo is working good but I am getting ready to build a heavy sporter for hunting and would like other options if Retumbo or H1000 don't work. Thanks.

David

 

[mac86951]

I have never used the Vihtavouri line of powders for any cartridge. I am working on a 7mm RSAUM with 168 grain bullets. I would like to try N560 and/or N570 but I can't find any data. If anyone has a good place to start and what velocities I can expect, please let me know. So far Retumbo is working good but I am getting ready to build a heavy sporter for hunting and would like other options if Retumbo or H1000 don't work. Thanks.

David

I'll dig thru my notes; N560 works quite well but typically heavier 180gr bullets.
http://forum.accurateshooter.com/threads/help-please-quick-load-7mmsaum-load.3914944/
I have had great success with 7828ssc and the 162gr BTHP from Hornady.

-Mac

 

[B23]

I have never used the Vihtavouri line of powders for any cartridge. I am working on a 7mm RSAUM with 168 grain bullets. I would like to try N560 and/or N570 but I can't find any data. If anyone has a good place to start and what velocities I can expect, please let me know. So far Retumbo is working good but I am getting ready to build a heavy sporter for hunting and would like other options if Retumbo or H1000 don't work. Thanks.

David

Doubt you could get enough 570 in that size of case to make it perform with N560 or RL26 and those are the two powders QL shows as being top performers in the 7 RSAUM w/168's. Since RL26 is nearly impossible to find and if you already have some N560 on hand, that would be your best choice. Using standard default settings, QL shows max pressure w/N560 and the 168's at 62 grains and velocity around 3050 from a 26in tube. Start a few grains under that and work your way up from there.

 

[JLDavid]

Great. Thanks for the info!!!

 

[Rdlningcltchdmpr]

Just got R26 from bass pro.