baldhunter/Mule Deer: I too have had Douglas barrels in 7 Rem Mag and presently have one that "follows the manuals" pretty well. Another that is now shot out and long gone did the same.
I have seen Remington barrels show on the "slow side" and don't know why this is.But I did not own the rifles myself so knew nothing about the throats etc.
The rifle that took 7mm Weatherby data was a Krieger CM 9 twist, 4 land barrel with a "longish throat. I could cite the load with H4831 and 160's but would be branded a reckless nut for using the load but it worked fine at those charges and I got pretty standard case life. In fact, the rifle would not "shoot" well until I had approached 7mm Weatherby data.
Like I mentioned it is well to approach any 7mm Rem Mag as if it were a wildcat.In truth I think some other cartridges display these tendencies as well but the 7 Rem Mag gets mentioned more often than others in this regard.
