Temp sensativity of Ramshot Magnum

[6hangingc]

I will be starting load developement for my 338 Norma Mag in a week or so, and will be trying Ramshot Magnum. I can't seem to find any info on how temp sensative it is. The Ramshot is suppose to have some of the best velocities w/ accuracy for the 338NM, but since here in Mont. tempratures can vary from +90 in atelope season to -20 in elk season, I am a little concerned in how this powder will handle the variations.

Since the Ramshot website doesn't seem to offer any info on this, does anyone out there have any experience with this powder that can help me out here.

[freebird63]

I tried ramshot magnum powder in my 300RUM and the pressure was way too high for me, got rid of the stuff and went back to retumbo

[RockZ]

I'm using Ramshot Magnum in my 300win mag and 6-284 and it has proven to be very stable and accurate.
I live in Fl so the temp swings are not nearly as great.

[6hangingc]

Originally Posted by RockZ

I'm using Ramshot Magnum in my 300win mag and 6-284 and it has proven to be very stable and accurate.
I live in Fl so the temp swings are not nearly as great.

RockZ,
Thanks for the info. From what I understand, it's the higher tempratures that cause the most problems with velocities, not the low ones. And being from FL I'm sure you have shot in plenty of warm temps, so Im sure you would have you would have experienced some velocity spikes if it was sensative to the heat.

Since my first post I ran across another post here that had a link to a balistics lab report from some people at Barnes bullets . They had done a little testing of several different powders and primers for velocities at different temprature extremes. Ramshot magnum and H1000 were a couple of the powders they tried in the magnum caliber. It showed that the Ramshot was comprable to H1000 and they were the best two they tested. The other two tested with the 300WM were IMR4831 and RL22, both showing signicant velocity spikes with the high temps.
Not sure how extensive their testing was, and it was with only 4 powders with the 300WM only. But it does appear that the Ramshot should be , as you also said, quite stable.

[coyotezapper]

Check out this link and the test data for the 300 Win Mag with Ramshot Magnum powder. It made me want to test it.

July 2010 Barnes Bullet-N | Barnes Bullets

[6hangingc]

Zapper
Thats the link I was talking about earlier. I beleive it was you who I got it from in an earlier discussion on the difference between IMR 4350 and H4350.
Thanks , it was an interesting read. And I also enjoyed seeing the picture of the Mule Deer that Randy Brooks shot. A real hog.

[RockZ]

I am having no problems with the higher temps.
It 's 95+ and i'm getting 3400 fps with the 6-284 with the 107 smk's with no excess pressure signs.
So at the high temps it is very good.
with the 3oo win and 208 amax i'm getting the same pointof impact with 77.5-79.5 gr. at 500 meters
so i settled on78 .5gr.