I use what ever the load call for the cartridge I am loading for. I will tell you that I been known to use the Federal 215 primer in all my ammo if I am going to be hunting in extreme cold. Sub Zero temps. In hot temps I make modifications to keep pressures with in reason. I am most concerned with reliable feeding extraction rather than the last 1/4 inch in Accuracy or that last 50 fps in velocity. Most of the time, you would not even notice the difference. I tend to do things more for piece of mind than anything else. Then again when you have 800 dollars rapped up with and elk tag for the late season you tend to split hairs. These days with shortages of ammo loaded or components to load ammo, using what ever you can find a buy makes sense. I like federal 210's and 215's but if all I can get is Remington's Winchesters or CCI's I would not loose any sleep over it.
