Used a lot of 2520 but the variations lot to lot finally did me in with that. And for the most part with AA after that.
Could not handle a 200 fps variation from one lot to the next that a charge change could not cover without pressure issues.
Twas a bit temp sensitive too.
YMMV.
I've had sporadic results with that powder as well. Probably one of the worst I've tried. Accuracy was very sub par and unusual while using that powder.. I won't use it in another 223/556. Was experimenting with it in my new 308w yesterday and results were not bad. Not great, but not bad..
