I didn't look at all these websites, but I'm sure they all have a common theme: try to send the bullets down a clean unfouled barrel for the first five or ten shots - so each bullet can pass over bare steel and burnish it slightly. The method I have used over the years is to use a heavy-for-caliber bullet - preferably a round nose to get maximum bearing surface. Clean the barrel every shot for the first ten shots. Make sure you start out with a really clean barrel.

By cleaning, I mean to push a couple wet patches through the barrel followed by ten brush strokes with a wet brush. Wet the initial patches and brass brush with Sweet's 7.62. Then start pushing through patches wet with Shooter's Choice until they come out clean - hopefully no more than four or five. Then a couple of dry patches. Fire another round. Repeat.

After the first ten, then clean every five shots for the next thirty. Then just shoot it as normal.