RE: 30-06 brass life
It may be partly the caliber but usually if the head space is right and the loads are kept within reasonable level, most all casings should have a pretty long life. I have reloaded for most all the standard calibers and most of the magnums. I had one 30-06 that went through cases pretty fast but on having it checked out I found that it has excessive head space. I went ahead and had it rebarreled to 280. I could have had it re head spaced but I wanted to try a 280 and at the time there were no LH 280's available.