With all this in mind, I would advise NOT using this type of patch lube for a hunting load. I've been using a tallow-like lube called Lube 103 for the past ten years or so, and I have not experienced any bore deterioration at all. So stick to the animal fat/oil concockshuns and save your barrels. LV is wonderful for target and trail shooting but I won't use it for prolonged load.
Am I permitted a bit of a chuckle here.
The Lube 103 is far from a tallow.
Young Coutry 103 Lube has been around for a long time. Going back into the early 1980's. Twas nothing more than repackaged Chap Stick. A petrolatum based lube. About 45 parts of Petrolatum with cetyl alcohol and about 50 parts of water with a topical agent for chapped lips.
The story went that Young was at the range one day and had forgotten his patch lube. But he did have a tube of Chap Stick in his pocket which he then used to lube some patches and it worked well.
If you heated his plastic container to dip patches in the melted lube it separated out with the petrolatum floating on the water.
The first Ox-Yoke lube out was nothing more than repackaged Young Country 103 which itself was repackaged Chap-Stick.
Now before folks go ballistic on the thing about petrolatum being a petroleum product it is important to understand that it is a wax. Petroleum waxes will not asphalt varnish a bore with black powder.
It was Bottomly at Ox-Joke who started this whole nonsenical thing about petroleum products in a bp bore. Petroleum waxes are no problem Petroleum oils and greases are a problem.