I don't know how you can expect to take one man's rifle "pet" load and expect it to be a good load in your rifle too since his rifle isn't your rifle!! In other words, does his rifle have the same length of barrel, same rate of twist, etc.? Is his load touching the lands, or not? What's his COAL? What type of rifle is bigcountry loading for? Is it even the same as what you're wanting to load for? What good is a load without knowing all of that?
If and when handloading, the quickest way to find an accurate load for YOUR rifle is to start at the minimum suggested load and work your way up to the max. suggested load.
There are no short cuts!!