I have a TIKKA TX3 8" twist. Usually I load a Hornady 140g ELDM with 40.6gr of IMR 4350, Lapua brass and Winchester primer. Mostly I would like to change the powder bullet combo because my recipe is hard to find locally sometimes and I hope to out shoot my brother at 600 yrds. Also I have a AR 223 DPMS 8" twist. Usually 69g Sierra BTHP, 23.5gr Magic Fairy dust (IMR 8208 XBR) Winchester primer. I guess the Fairys are extinct. I found a box of 500 Berger 140g Hybrid Target, which just looks like BTHP to me. For the Remington 223 I would like to find a new powder that is temperature stable and also accurate. Is there anything out there that compares to the 8208XBR. Any help would be greatly appreciated.