Home Forums Hunting & Shooting Long Range Hunting Temprature stable powder for long range?

Good point, Kman

I've been watching H1000 in the 7mmMashburn Super for a year now....it does not give the very highest velocities but is only 50-75 fps off Retumbo, but spreads are very low,and POI consistent winter to summer, out to 600 yards.

I have not touched the scope settings since the rifle was zeroed about a year ago.

I agree with John B on the temp thing,at least from what I can tell.....and noticed years ago that a powder that looks lousy in one cartridge, does well in another.....for example, I found IMR 4831 to be "good" in the 270 over various temps, but not so in the 7RM,where it lost velocity in the cold.

Sometimes, I think powders that give slightly compressed loads do better,but not sure why.

I ended up usuing Ramshot hunter in my 1000 yard light rifle.
My best load gave up 7 mil clicks from 850 to 1000 yards when the temp went from 80 to 35 degrees.
The Berger program told me I'd only loose 3 clicks on a 80 to 35 degree temp change.
My velocity at 80 degrees was measured at 2806.
I had to back it down to 2730 to get it worked out right.
dave

I recently found that I have about 3.5 lbs of H450 stored away. Don't remember why I bought it or what I'll do with it.

Bob

How hot your running your load may have some bearing on temperature stability. Or at least that was the conclusion that I came to when I tried a bit of the freezer testing. I found that the same gun with different loads of the same powder and different bullets lost velocity differently. I wish it was as simple as "X powder loses 4fps for every 10 degree temperature drop." Unfortunately, I do not think it is that simple.

I run h1000 in my 243 with 105's. Seems to be pretty stable and consistent. Shot a buck with it Friday with a 105 vld. I'm going to start working on an h1000 load for my 264 and 300 wsm too. I think a guy can cover most bases with Benchmark, h4350, and h1000.

Bb

AR Comp would be another powder to consider. In this test, it was twice as good as Varget for temperature stability.

http://snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2812538