Got you a thinking. Good! The only thing powder is higher than hell presently. When you see something that can be download do so. Set yourself up a folder with sub folders inside of that. simple example is like Powder, Primers, Brass, Bullets, Barrels & twist rates. A go to place for are selling product. (becareful on just who the supplier is) Powders to be buy in lots. Primers are almost impossible to acquire presently in Large Rifle. Small Rifle is a different story. I would try and stay with match primers if possible. I do use Fed 210 LR primers, and have had very good luck if you want to call it that. There is so many thing to watch for and learn about, and this is the place to do that. My use of hunting rifle is making that cold bore shot no matter what the temp is. I use H4350 and H4831SC mostly.
Don't feel bad, it's a learning cure, and I have been reloading for 61yrs now. I am still learning and by far will until I go to my grave.
I feel that you was a tank jock? Being your handle.
In the past I develop loads in what ever weather it was and petty much do the same now. Being I was mostly in S. Cal it didn't make much differents. I had a load in IMR powder that was grouping under 1/2" @ 100yds. Temp was in the 40's to 50 range. Let it set until later on that year or end of June (80-90 dgrs). I fired round a shot using the same load figuring on shooting 5 rounds. It blew the primer out of the primer pocket. When home that day and took apart 49 rounds. Gave-a-way about 16 lbs of powder.
