You do not give any information regarding powder charge or velocity of your load. The 270 grain launched from the muzzle at 1,000 to 1,200 is going to be effective on whitetail without the relatively heavier recoil associated with max loads.
Otherwise, you can look along the line of a .300 Whisper or .30-30 using 125 grain Nosler Ballistic Tips, the 7X30 Waters, or 6.5 JDJ with similar weight bullets. There are many more calibers with which deer have been taken.