If you go on this hunt w/ a 270 your a fool. period. It is obvious that you dont have full confidence in the caliber, and w/ good reason. The 270 IS light for elk, look at some of the posts on the subject. the jist of them will be that the 270 will kill elk, but its less than ideal. W/ the money you've put out just go buy the same model as your 270 in a 300mag or up. You can and I would recommend going through a reloading manual and finding a caliber/load combo that comes close to matching the trajectory of your 270 that you already know. For example, I use loads in my 6mm and 300win mag that have similar trajectories so that I dont have to worry about how much drop this one has or that one has, they'renearly the same. For example, i looked up real quickly and it looks like a 180gr @3000ft/sec out of a 300win will shoot almost the same but slightly flatterthan the 130gr @3000ft/sec out of the 270. w/ a 100yd zero -the 300 will shoot .1" higherat200yds -and only .7" higher at 300yds. .7inches difference at 300yds isnt much. As far as loosing an elk, my experienve has been that very few elk are claimed by other hunters, but rather most that are lost are hit and run offnever to be found period. With the chance of a lifetime on the line, get a caliber better suited to the game. Best of luck, if you should have to cancel by the way I would be more than happy to go in your place