We have had good sucess with using the delphies in the shop and carters. I have not used a Airtex yet. That being said you can always get a bad part right out of the box
I shoot a 7mm and love it. My reasons are the same as magnets.. I did a lot of research before buying the rifle just to make sure that it was going to be happy with it. I do agree it is a little big for smaller deer, but I can get away with a "bad shot" and not have to track it down as far.
I...
I use spectro in all of my toys, and have had no issues yet. Their synthetic 2 stroke oil in my sled, their engine oil my quad and boat.
It boils down to what you feel is the best oil in your mind and your wallet. As long as you use the proper oil for the right application you should be fine...