Originally Posted by webs
Ok so I was looking around and haven't found an answer yet. I know load development is supposed to be done in hotter weather but say you were to do load development with H1000 would you worry to much about the heat? If I find the max load in cold weather and back off a grain or so does one normally see increased pressures in the summer with extreme powders?
I know that some guys keep their cartridges warm when doing cold weather load development. Is this worth it? I believe it will be happening around 20 degrees.
I will usually shoot a load in BOTH cold and hot weather before I'm sure it's worth taking afield. I like to see what my stuff is doing at zero (or roundabouts) because the accuracy isn't usually the same as hot weather. The barrel harmonics change a bunch from 0 to 100 degrees and I need to know I'm at useable accuracy at both ends and
in between. A load that shoots well at 80 degrees but blows chunks at 10 degrees is useless.
As far as getting a load too hot pressure wise in hot weather when you develop in cold weather; don't shoot for the moon speed/pressure wise and use book data and you will be fine 99% of the time and only a bit warm the rest of the time. Adjust a bit if you are warm; you should have data for lighter charges from load developement. Build a bit of headroom into the load; it's only prudent. Get a big enough rifle to start with.