I used 46gr of RE25 with the 115 DTAC. I got .3 MOA and 3050fps on a cool day but pressure signs like crazy when the ambient temp exceeded 70 degrees. Had to keep loads on ice during matches. 47.3 grains was even tighter groups but had to be cold outside. Ended up breaking an ejector and spring, ruined a lot of Lapua brass. I'm done with Alliant powders.