I handloaded 75 rounds very precisely. Cleaned, polished, measured the cases and used only very, very similar ones. Then hand weighted the powder to within a one thousandth. Did the same with the bullets. Ran them thru the RCBS, remeasured, re-weighted the final product. Went out to the range, set up the chronograph and went to town. I fired 10 rounds and nine were all within 60 fps of each other. One bastard round went out at 115 fps faster than the others.
Then I recleaned the the barrel (I use M-Pro 7) and started over doing it the way they wanted me to.
[ DO NOT use hot loads when you are doing this because you could apply too much MILITEC-1 and bring the compression numbers too high.]
Apply a light coat of MILITEC-1 to the inside of the barrel. Rapid fire 5 rounds and run the patch thru again, rapid fire another 5 rounds and run the patch thru again, rapid fire 5 rounds and run the patch thru again.
[What you have done is heat the barrel allowing the MILITEC-1 to condition the metal. Each time the barrel gets hotter and the MILITEC-1 goes deeper into the metal.]
After 15 shots I had an average of 132 fps faster than with the untreated barrel, my shots kept going lower and then settled out. They had dropped 1 1/4 inch and tightened up 4/10's of an inch.
It supposedly remains in the metal even after repeated firing - - a minimum of 1,000 rounds. I've seen numbers of 3000 but I am probably reusing it every 200 to 500 or so. Whenever I come home from the range and then clean the rifle, I reapply a very light coat of MILITEC-1.
Traditional lubes temporarily bathe and coat the metal surfaces and create a temporary film between all metal parts. Since the condition is only temporary, a lack of constant lubrication, over a short time, leaves the weapon unprotected due to the effects of firing. The combustion flash burns the traditional surface lubes off. This is what causes throat wear.
"It seals the metal, reduces friction, and creates a self-lubricating effect by stiffening the metal without hardening it." How, I don't know but it works.
The other advantages I found are much easier cleaning. What used to take 15 minutes is now done in five.
One more trick I like about this stuff is it reduced the trigger pull almost one pound. I heated the firing system out in the sun and poured a bit of MILITEC-1 on the whole mess. Springs, sear, everything then covered them with a black garbage bag. I just let it bake from about noon until four. The next morning when I re-assembled everything the trigger seemed different, just a bit too light. It had been 2 1/2 pounds forever. Measured it and came out with 1 7/8. Glad I caught it before I went to the range. LOL Didn't want an oops in front of my partner.
So, now I am an absolute believer in MILITEC-1. I have friends who use it in black powder long bores, shotguns, and handguns . Barrett includes a bottle when you buy a .50 from them. Who knows what makes it work? I just know it works for me. Good luck