N
nmibex
Guest
experience with HBN coated bullets? Is it worth the effort and expense, help with barrel life and accuracy? I've searched this and other sites and didn't find any current feedback.
We are using the 5 micron HCPL to coat bullets. One pound of Boron Nitride is sent to you in a plastic bag in a USPS medium flat rate box. If, Big If, you get all the BN out of the plastic bag it will fill three two pound Hodgdon powder cans. The big enemies of a neat transfer from the bag to some other container are air movement, static, and your breath. This stuff is that light. The good part is that it's boron and not a toxic item. In fact, it is used as a base in the cosmetic industry - I'm told.
What the heck, I may as well tell you the method we use for coating bullets.
We clean the bullets first with Acetone and dry them. This is easily accomplished as the acetone dries instantly. We tumble about 100 .30 caliber bullets or 150 6mm bullets in a Lyman Turbo vibratory tumbler for 25 minutes in five pounds of #4 steel shot. That's right, I said STEEL shot. Lead shot will not work for this purpose. Copper BBs will bot work either. I got our steel shot here: http://www.ballisticproducts.com/Steel/products/70/ They list a 10 pound bag of #4 steel shot as # SHO4 You only need about five pounds but 10 pounds is the minimum order.
You only need as much BN as what the tip of a #2 straight screw driver will hold. After tumbling for 25 minutes separate the shot and bullets and "tumble" the bullets in a bath towel.