Lead stearate is a salt of stearic acid and is sometimes referred to as the ‘lead soap’ of stearic acid. 
It is a stabilizer and is used as a thickener or hardener.
It occurs in the form as a powdery white solid with a slight fatty odor. 
It has a very niche use in the plastics, paint and varnish industry and has to be handled carefully because it is toxic by inhalation and ingestion.
You are supposed to wear full protective clothing to handle this stuff.

Hopefully the wind does not blow the BP smoke containing lube particles back at you or that you properly wash your hands after making or handling the lube or cleaning your rifle.

The hard Ivory soap precipitates out if you melt this lube again such as pan lubing.

There are hard and soft emulsifiers and you need a soft emulsifier if you wish to melt again to pan lube.

Lead Stearate Safety Data:

Section 3 – Hazards Identification
3.1 Classification of the substance according to GHS
Respiratory sensitization (Category 1)
H360: May damage fertility or the unborn child.
Acute toxicity (Category 4)
H302: Harmful if swallowed.
H332: Harmful if inhaled.
Specific target organ toxicity – repeat exposure (Category 2)
H373 May cause damage to the reproductive system, the blood, the brain and the endocrine system through
prolonged or repeated exposure. Route of exposure: Oral, Inhalative.
3.2. GHS Label elements, including precautionary statements
Tradeasia International PTE LTD
133 Cecil Street # 12-03 Keck Seng Tower, Singapore 069535
Tel: +65-6227 6365 Fax: +65-6225 6286
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GHS07: Harmful GHS08: Health Hazard
Precautionary statements
P260: Do not breathe dust/fume/gas/mist/vapours/spray.
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P281: Use personal protective equipment as required.
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P405: Store locked up.
P501: Dispose of contents/container in accordance with local/regional/national/international regulations.
3.3. Other hazards which do not result in classification
Not applicable.
Section 4 – First-Aid Measures
4.1. Description of first aid mesaures
Description of first aid measures
After inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
After skin contact
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.
After eye contact
Rinse opened eye for several minutes under running water. Then consult a doctor.
After swallowing
Seek medical treatment.

Health Hazard:
INHALATION: Joint and muscle pains, headache, dizziness, and insomnia. Weakness, frequently of extensor muscles of hand and wrist (unilateral or bilateral). Heavy contamination - brain damage. Stupor progressing to coma - with or without convulsion, often death. Excitation, confusion and mania less common. Cerebrospinal pressure may be increased. INGESTION: Abdominal pain, diarrhea, constipation, loss of appetite, muscular weakness, headache, blue line on gums, metallic taste, nausea, and vomiting. (USCG, 1999)

Incompatibilities:
Dust may form explosive mixture with air; keep away from high heat and sources of ignition. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorin

Just buy Javalina Schuetzen Lube and be done with it. LOL
Still the BEST stuff out there.......

RAM-
I’ve had good results with the following lube recipe in my BPCR.

50% beeswax (melted  liquid volume)
40% anhydrous lanolin (melted liquid volume)
10% canola oil (liquid volume)

The lanolin can be bought online or at a health food store.
I got it at ‘The Grain Bin’ in Alexandria. You’re not far from there.

Good luck.
Ted K

Thanks guys for the help. Ted Kramer I am from Browerville so very familiar with long prairie. Its a small world.

It's been years since I contacted them, but you might try 
Ralph & Verna Schneider (715) 287-4224.  Nice list of Cast bullet lubricants.

bpjack-

Is the mink oil paste the same stuff Track of the Wolf sells as patch lube for muzzleloaders?

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It’s very good patch lube so I would think adding a bit to a BPCR lube would be a good thing as well as the Lubegard. I’m going to give it a try. Thanks.

Ted K