IMR4350 and 139 Grain Hornady Interlock bullets. I use these on pronghorn and it would make a great load for deer too. Usually Pronghorn season is not too cold, sometimes as warm as 70 degrees. (For cold weather shooting I like my 280 Rem w/ 154 grain Hornady Interlock bullets and H4831SC powder. This load is good for white deer, mule deer and larger species of the deer family.) I have not worked up a load for the 7x57 for deer where hunting could easily be 20 below. With the new temperature tolerant IMR powders, I'd bet that a person could find a good "all temperature" powder to go with my favored 139 Grain Hornady 7mm bullets. I stay away from ball powders for hunting but like ball powders for target shooting where I'm certain the temperature is likely shirt sleeve temp's.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
