If you are looking for " Clean " and " Neat", you are in the wrong sport.
If you are only going to " Try a few " in your gun, then use bore butter( wonderlube) to lube the grooves, manually, before loading the bullet in your barrel. Excess lube can be wiped off with leaves, or a rag, or paper towel. You should take a clean rag, or paper towels with you every time you shoot BP, so you can wash your hands, and minimize the transfer of of crud from the gun to your clothes.
If you decide you want to shoot these bullets on a regular basis, you can use one of the commercial hard lubes( SPG lube is well liked by the BPCR shooters), melt it, put the bullets in some kind of flat container, nose up, and pour in the melted lube, enough to cover the grease grooves, and let it cool. Then use a caliber size punch or tube to " cut" the bullets free of the lube " Cake". There used to be a " Cake Cutter " sold for this kind of work, but I have not seen the product in years. Not new.
I once met a shooter who shot conicals who actually had a bullet BLOCK he made in which he places his lubed conicals, similar to what we do with a ball block, to hold PRBs. I don't remember how many bullets he had in that block, but it weighed a lot. He did not carry that block around his neck on a string!
He claimed the main advantage to using the block was it kept the bullets STRAIGHT as he drove them into his barrel, much as a " false Muzzle " does for slug gun shooters. Since his bullets were sized .001" smaller than his bore diameter, I could not see the necessity or advantage.
I did think such a " bullet block" would tend to keep lint, dirt, and debris out of the lubed grease groove better than just putting the bullets in a box. :thumbsup: