I shoot mostly smokeless Sam and I always get a lube star if I have the right lube on my bullets.
Since I shoot velocities around 1350 I also use softer lubes like many BP shooters use.

Looks like that bullet groove would take a 1/2 lb of grease! Where is it going? Like Westerner said, no worries if it shoots good. Curious though. 
HG

Well I personally think a lube star is important. Without it how does one know when the lube ran out in the bore? Was it halfway down the bore, or just inches behind the muzzle. 
Of course leading will eventually tell me whether the lube held up to the length of the bore, and accuracy. But I can at least rule out lube if I'm having any issues and I have a good lube star. If I don't then it's one more thing to consider looking at.

I picked that abullet because of the bigger lube grove. DGL is a fairly soft lube made for black powder. The barrel its self is old but I had it relined so the bore is brand new. So far it has had just 20 rounds down the bore.  Last 10 shots would fit in the palm of my had at 50 yards and that includes moving the sights to the left and up a little. I saw very little lube left on the muzzle. It will get a good cleaning and a bore scope down the barrel this evening to check for any leading but a quick eyeball didn't show any , or at least not yet. 
Mose likely the next loads will be with bp and hopefully that will not cause any problems. 
Over all I was happy with how well it shot when you consider it was just a ball park load. It was 16.7 Gr of 5477, more than what lyman recomended but I have seen others use up 17 gr. No signs of pressure on the primer so I guess it was a safe enough load. I do have a feeling that a case full of Black will make the old girl stand up and shout a bit. Recoil was a little surprising, but nothing uncomfortable. 
Sam

I think the Nuce has finally got a load so efficient there is no bullet lube being wasted. It stops doing it's job just short of the muzzle. I can appreciate his efficiency because bullet lube, as we all know, doesn't grow on trees. No sense wasting it. Waste not want not, etc etc... 

I took a good close look at the muzzle with a light and couldn't see any leading. I had ran a couple of solvent patches through it yesterday before I left the range and let it sit since then. Ran a couple of more through  it tonight and I can not see any leading. I do see what looks to be perhaps a little bit of chatter from the cutter but other than that it looked good. Tomorrow it will get a good brushing with a different solvent  and see what comes out. It seems like its holding a bit or dirt or carbon.   Maybe the fact that it was on the cold side yesterday the lube star was just hiding. At the end of the last string I did see just a bit of a ring around the bore perhaps from lube. I guess as long as it isn't leading all is good. 
Sam