BILLET LOADING BLOCKS Area 419 Billet Anodized Loading block. The same awesome loading block you've come to love from them, just anodized to hold up to all your abuse better. 50 places of 308, Magnum, or Lapua bolt faced rounds. Features rubber pads on the bottom to keep from sliding around. Block is machined in house from 6061-T6 Aluminum. Dimensions are 9.5a ^2 x 4a ^2 x 5/8a ^2. Holes are 0.500a ^2 deep and are a tight fit around the case to prevent tipping over. Hole bottoms have a small "divot" in the very center to catch powder kernels and prevent any possible accidents with primers. HOLE DIAMETERS Mfg: Area 419