I'm going to spill the beans about what I have found shooting these powder rifles. My competition days on the line are close to an end so I can forget to close the gate and let the cattle out.
What I found shooting lead is GG bullets is getting a bullet with shallow but wide grooves. The wide shallow grooves expose more lube to the bore and you don't need those deep grooves when only maybe five thousands deep lube ever gets used. Most grooves are .004" deep and from what I can measure from recovered bullets the bullet that starts at groove diameter does not upset hardly any so maybe only .005" ever comes in contact with the bore. I also measured spun off lube from bullets I shot and the lube is still as deep as the grooves minus the depth of the lands where they cut the lube. All deep grooves do is slow the bullet from drag. shallow wide grooves do two things. It delivers more lube to the bore and reduces setback except for the nose that is unsupported with to soft an alloy.
Here are GG bullets I use when I shoot them. They have lube from the base clear up on the nose where the lands make contact. You cant buy bullets like I use, you have to make them.
Those GG "money" are covered the whole portion of lead that makes contact with the bore and when that bullet leaves the bore it is smooth except very small holes.
These bullets with out grooves hold more lube then a normal GG used. with a lot less drag when they leave the muzzle. And I have yet to find one that has lube in those little diamonds, it all spins off.
As far as lube goes. There are better carriers then B wax now days. B wax was the only thing going in the past except Tallow.
I have a lube that is very good but the components are expensive and mixing them is time involved making it. When I run out of it I wont make any more because just plain inexpensive Soy wax and Vaseline thinned with peanut oil works as well as most lube you buy over the counter.
I like my lube as soft. When I squeeze it between my thumb and finger it just about turns to liquid and I use it when it's hot, but you must have a wad stack that will hole it from migrating.
People make this black powder stuff to complicated. Keep it simple and spend your time prepping your brass and cast a good bullet and proper loading procedures.
By the way, my lubes are made with a some petroleum stuff in it.