Please help! I've been reloading for about 2 years and I consider myself a careful reloader. Yesterday I had a very perplexing situation happen. Everything that I shot was too hot and I don't know why. Everything I have tested, chronographed and verfied several times. I just went out to shoot for groups yesterday. Here are my loads:
Model 7 22" barrel
200 Nos AB
Chrono'd @ 2635fps
Model 700 26" barrel
180 Hornandy SST
These loads were developed between temps of 20-40 degrees. Yesterday the weather was really nasty. It was 32 degrees and snowing heavily. (Yes I was out in it, you have to be to live in Alaska!)
Both loads showed giant shiny spots on the top of the brass and the bolt was hard to open. I shot a couple of each to be sure and got the same resuts. Then I picked up my 22-250 and some factory junk that I was getting rid of did the same thing!
I keep very thorough notes and I'm a careful reloader. I'm hesitant to tear these loads apart and start over.
My 2 hypothesis are:
1. My guns cooled very quickly in the weather. My ammo was on the bench but in boxes. Maybe it didn't cool as quickly, leaving a big difference in ammo v gun temp? Didn't feel like it but maybe...?
2. The blowing snow made the humidity 100% and combined 32 degrees made everything work weird...?
I don't want to question everything because I don't know where to start.
Any insight would be greatly appretiated.