Back in the 90's. Jeff Fowler shot a phenominol record with 2015, he used it exclusivly.
But alas, the 2015 he used is not the same 2015 of now. Or, at least, nobody can make it shoot like that particular lot, (manufactured in Israel). Back in the mid 90's, when I first started shooting Benchrest, several locals in the Houston area were using it.
On paper, and in actual use, the burn rate is about like N130, maybe a tad slower. It certaily fits into the load window of the 6PPC, but as to whether you can shoot competitive aggs is a different story.
What I do if I am trying something different is dig out the Chrono, load the cases up to about 3300, and work from there. Every barrel bullet combo is different, and is especially so when working with small capacity cases such as are used in Benchrest..........jackie