Alberta Hunter

When you walk out into the field with over 78 Elk moving through it. And your party gets a 5 point, the lead cow, and a first year bull. This year I bought a R1 270 WSM, and need your assistance, anyone tell me what Brand and grain Bullet this rifle will like? I cannot afford to go out and buy 8 different types, so asking your advice. RE the R1 just shot it for the first time on Saturday, all I can say is WOW! Had a Remington 742, jammed on the first shot, in a snow storm at a Royal 7 point Elk. Took a torch to it. My Son in Laws Browning Bar, would not fire in the -20 November weather up here. So he walked with it on his head like antlers towards the moose. Thanks in advance Walter