Nekekami,
Yes, part of it could be related to that. The issue first started with the .264 Winchester Magnum which came out back in the 60's. This was a 6.5 that was launching 140gr's at 3000+ fps. As you can imagine, the performance was amazing. But catch this, the cartridge got a reputation of burning out barrels, with many barrels lasting less then 100 rounds, yes, that is one HUNDRED rounds. The throat just gets toasted. Now, is this because of the long 6.5 bullets? No one knows for sure. I know of the 6.5x55 Swede's popularity in Europe, and its well deserved, I personally am a huge fan. But as I was researching calibers for the upcoming SC2, I started looking into the .264 Mag, the .260 Remington and the 6.5x284 Norma. Blackhills loads a 142gr 6.5x284 at 2950fps, which is an amazing performing load. We talked to many manufacturers, and everyone in the USA is scared of the 6.5's when the velocities go up. Now, I am specifically talking about the 140gr range of bullets (or there abouts). It was nearly a concensus of the USA manufacturers that up to about 2800 fps you are fine and should get 4000+ rounds from a barrel. But pushing to 2900+ fps and you can halve that amount for barrel life. For many people, that may be fine, and in reality is probably as good as you'll see from a 7mm Rem mag. Its just something to be careful of.
Now, I will admit, USA manufacturers are FAR behind the European's when it comes to the 6.5. I would not be surprised if there is a secret that has not made it to the USA yet in regards to this special bullet and keeping the rifles happy that shoot them. Personally, I like lapua and norma when it comes to talking the 6.5, but there is no one in their tech departments that I think I can call for their opinion.
Thanks for the discussion!!
MEL