I have a TREMENDOUS amount of trouble believing that the barrels of the 710 are pressed in , especially considering that they are available in 7mm Mag. Nonetheless, between the NEF and the 710, with no other options, take the 710 every time.
IMHO the term "throw away rifle" is absurd and belittling. I personally don't like the looks of the 710, but for those that like it, it will make a fine rifle. I don't particularly like the ARs either, and to me they are CONSIDERABLY closer to being a "throw away rifle", made of aluminum and plastic rather than steel and wood, but if they float your boat then go for it. We all have likes and dislikes, but is it necessary to put down the other guy because his likes and dislikes don't exactly match your own??? I happen to like and own Remington 700 Classics, as well as Remington 788s, but if you own ARs and Glocks, then more power to you. If we squabble among ourselves, it is harder to have a united front against those who would take ALL of our guns away. Think about it, the guy is a shooter, so he is one of us. Enough said.