Originally Posted by Topshot
Can anyone advise me how many rounds it would take in a .338 Edge before
throat erosion starts to effect muzzle velocity?
Less than a 338 RUM, more than a 338-378 Weatherby. Neither of those are as bad as a 264 Win Mag or a 7mm RUM for throat erosion. There are lots of variables including the specific loads, rate of fire, and even the ambient temperature.
But why be concerned? Barrels are made to be replaced. The cost of a new barrel won't be close to the cost of the ammo it will take to burn it out.