Checking Lead Hardness With Drawing Pencils - Cast Bullet Forum
Jun 27, 2019 · THE PENCIL TEST FOR LEAD ALLOY HARDNESS . Ken Mollohan . The pencil industry manufactures what are called 'art pencils' for draftsmen, artists, etc. They are available as either conventional wood sheathed graphitic cores, or as a …
Can one tell BNH of a casted bullet with out the Lee and that other ...
Aug 11, 2020 · The article that Mitch was referring to was written by me. It is on the forum so you can pull it up and read it. The name of the discussion was-Checking Lead Hardness With Drawing Pencils. It works very well. It takes a little bit of practice to start with. Mashburn. David A. Cogburn
Cabin Tree Hardness Tester - Cast Bullet Forum
Mar 18, 2021 · I am not sure when or why, but the chart I have shows pure lead at .020-.030" and with pure samples from Bill Ferguson, Pure should read .032" The other samples were Ly #2 and Lino and the test chart and machine did agree with those samples.
Best way to use Lee hardness tester - Cast Bullet Forum
Feb 17, 2013 · I am well satisfied with the LBT gadget but recently ordered a Lee Hardness Testing Kit because its approach is closer to the real ASTM Brinell hardness test apparatus. The Lee kit consists of a calibrated ball indenter to make dents in the test specimen under a set load, a V block gadget to hold bullets in a horizontal position for testing ...
25:1 lead/tin. What Brinell.? - Cast Bullet Forum
Sep 12, 2015 · For every 1% additional antimony, Brinell hardness increases 0.9. For a simple equation, Brinell = 8.60 + ( 0.29 * Tin ) + ( 0.92 * Antimony ) You see that at the bottom of every page on the RotoMetals site, it gets asked a lot. I have the Lee Hardness Test Kit also and am completely happy with it.
Does heating bullets during powdercoating re-start the age …
Nov 4, 2023 · But, if I in the meantime powder coat them by heating at 450F for a couple of minutes to melt the powder, and then at 400F for 20 more minutes to bake the powder, does this cause the hardness to again "fall" to where it was right after casting and "re-start the clock" on the hardening process? Jim G
Lyman #2 - Cast Bullet Forum
Feb 10, 2013 · The 5% tin and 5% antimony with 90% lead in Lyman #2 has been the most popular hunting alloy for cast bullet shooters for well over 100 years because it has a very optimized mix of hardness and ductility for bullets that only need 1,000 foot pounds impact on game animals for double caliber expansion and 100% weight retention of bullets as they ...
BHN range for rifle bullets - Cast Bullet Forum
May 26, 2013 · Some details because that makes a difference. The rifle is a Ruger #1. This is a recreational rifle for range use and experimentation. Alloys are scrap lead of tested hardness and linotype. Molds my own and the generosity of others; Lyman 311042, 311291, and the RCBS 150 PB with others possibly to be added.
BREECH SEATING NOTES - Cast Bullet Forum
Dec 10, 2014 · While the mathematical relationship between bullet hardness, chamber pressure and accuracy, what I call the “Davis/Harris/Lee myth” , has been solidly disproved; there is the fact that harder bullets shoot better fast than do softer bullets. Soft bullets are thought to be needed to breech seat, limiting velocity to somewhere around 1500 fps.
Mixing linotype with straight lead - Cast Bullet Forum
Oct 26, 2009 · I just did some today. I mixed equal portions of pure lead and monotype. Cast 200 RCBS 35-200 FN, they weigh 202 gr. as cast, hardness tested 18 BHN. For WW equivilent, 3-to-1 lead to lino should be about right.