I have two coolants. High sulpher based cutting oil is one I either squirt on or brush on. I get it from a local oil distributer in 5 gallon cans. The other is a "Mist-Air" spray setup. It uses a water soluable type of coolant. I can't remember the name. But both have their own place and application. Try visiting your locqal machine or tool & die
shop and see what they say. They can also give you some insight about what distributer carries what oils.
I use a high sulpher cutting oil and flood the chamber/reamer. The water based coolants will dull a reamer quicker than an oil based coolant. Try the Mobil Met Omega with ATF mixed in, they say it's the Shiznit.
Good luck finding Mobilmet Omega in less than a 55 gal. drum. I just ordered 5 gallons and was sent Mobilmet 766, it replacement. Don't know if I am going to use the 766 or not. Anyone used it or know anything about it?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: US Handgunner</div><div class="ubbcode-body">I have been using Rustlick 255 R for chambering. It gives me super smooth and clean chambers. Its a water mixed coolant/cutting fluid that I use in a chamber flushing system. </div></div>
Please notice that I'm talking 20 years ago. I'm sure things have probably changed. But the shop I was working in at the time used Rustlick (don't know the number or series) and everyone in that shop that used it broke out with a skin disorder and it took six months of antibiotics to get rid of it. Since then I don't touch anything that says Rustlick on it. Try placing some in a shallow pan and leave it over the weekend. Check it and see if it feels like it has a grit like sand or sugar in a crust.