by Hoot » Sun Feb 19, 2012 8:08 pm
WRT heavy buffers. It is accepted knowledge that powdered tungsten has the same weight per unit volume as cast lead. If it were a solid bar, it would weight more than lead, but the powder has air in between the particles that make it less dense. Before I'd pay my hard earned money for a buffer with powdered tungsten, which you can buy for $45 per pound, I'd just cast a lead slug just a hair less than the inside diameter of the buffer and a hair short of tight fitting so it can rebound and debounce the bolt.
That's what I did in my LAR-8 buffer as the 308 barrel was slightly overgassed. It came with those sintered iron looking slugs with the rubber pads between them, like you see in most off-the-shelf buffers. Using the same conduit tubing approach like in my CCWS, I cast two solid lead slugs, then cut one into segments the same length as the stock iron ones. They got my buffer weight up from 4.6 to 6.2 ounces. Using a solid lead slug the length of all the segments and their rubber disks combined, with just one rubber disk on each end, I got it up to 7 ounces. So, you can expect an increase of either 35 or 50% depending upon which way you go.
For a small effort, you can save some serious change casting your own weight from scrap lead and a piece of left-over EMT conduit.
Hoot
In Theory, there is no difference between theory and practice. In Practice, there is.