Just wondering what theese things are? I know a good bit about guns but I'm not sure what theese terms mean. Thank's
1) Free Floating refers to barrel and forearm clearence. If the barrel and forearm "interfere" with each other, the result can be the barrel will be forced to move as it heats up.
2) Glass Beading is the material (actually epoxy resin) used to custom bed an action so that it can't shift.
3) Button Rifling: method of creating the grooves in a barrel
Steel barrel blanks destined for button rifling must start out the same way as their single-point cut and broach-cut cousins. The blank is deep-hole drilled and reamed, usually with rebuilt, early 20th century Pratt & Whitney drilling machines. As discussed above, some makers like to run a light lap through the bore prior to rifling, and others don't.
Made from very hard carbide, the "button" in button rifling has been
carefully machined with the reverse of the rifling pattern that is desired
for the barrel. It is marginally larger than the hole in the barrel blank.
This button is pushed through the hole under great pressure, displacing the steel into lands and grooves. In many respects, the process extrudes the rifling into the barrel, with the button acting as a moving, mini-mandrel.
As you might imagine, this process can put a lot of stress into the barrel
steel. If a button-rifled blank is contoured without any prior stress
relief, the release of the radial stresses resulting from the machining
process will cause the bore dimension to grow radically and unevenly down the bore. Button-rifled barrel makers most often eliminate these
dimensional variations by lapping the bore after contouring until the
dimensions are uniform and the surface is smooth. Some, including
BlackStar, Pac-Nor and Krieger, apply cryogenic stress relief technology to their barrels to completely eliminate stresses. In addition to being the pioneer in integrating cryogenic tempering into barrel production, BlackStar is the only barrel maker to apply this important technology twice to every barrel that it makes.
Today, most of the barrels used in benchrest competition are button-rifled, proving that these barrels are capable of producing consistently high levels of accuracy. The top custom button-rifled barrel makers in the United States include Hart Barrels in New York, BlackStar and Shilen in Texas, Lilja Precision Rifle Barrels in Montana, Pac-Nor Barreling in Oregon, and Schneider Custom Barrels in Arizona. Douglas, the old barrel maker in West Virginia, dominates the U.S. production of less expensive, after-market barrels.
