Sometimes new lots of powder can present all kinds of problems for the reloader and one thing for sure GB300Win was correct when he said, "I would groan every time I had to go to a new lot of powder." Man was that ever a descriptive statement.
My 358Win really loved that first pound of AA2495BR that GB300Win gave me to try. I would get 2480fps out of it and you all know how accurate the stuff was. Well, Jerry also gave me eight pounds of AA2495BR, new, never opened and it was a different lot than the first.
Well it was as accurate as the first pound he gave me, but would only give me 2330-2360fps. It was 4.85% cooler than the initial pound Jerry gave me to try. I had to develop new loads using Varget and IMR4320 that gave 1/2" to 3/4" groups with velocities of 2478fps-2510fps. So when I run out of that first pound of AA2495BR I will have good go to loads for my 358Win.
I have found a use for this eight pounds of AA2495BR. I will be using it in my 30-06 that I have been working with. This 06 has caused me to have patience but I always believed I could get it to shoot good without doing anything to the rifle. It is a good out of the box shooter.
POP ran his program and it said that with a 165gr bullet 51grs and above was dangerous. I have been able to get this lot of powder with a 165gr bullet to 52grs of powder and no flattened primers, no mark bases of brass and no over expanded brass bases.
51grs-52grs of AA2495BR brass
Here are the results of the day:
50.5grs just over an inch