Re: H1000 For .280 Ackley
I have shot it. The amount needed to get to where you need to be was highly compressed. Resulted in unpredictable pressures. I have have spoken to people here in the past that have used it with extra long drop tubes and have had better results. I didn't have a drop tube. I loaded a bunch of RL 17 over the years. It is very temp unstable. In Kentucky this is just not an option anymore as our temp swings are just too great. Shot a match in may a couple years ago in 100 degree temps and rifle became unsafe and had to DQ myself from match. Long story short 4831 is the powder I have found to be the best and most forgiving of all I have shot. My load is 61 gr with 162 amax. 3050 in KY gets u to 1000 @ 6.6 mils. Good load.
You mileage may vary.