Bullet and Cartridge Comparator

Modeled after the Hornady bullet comparator set. I noticed while comparing my friends Hornady comparator set to mine there is varying sizes of inner diameters by gauge. I have found these work well for reproducible measurements from base to ogive. May take a bit of fitting and truing the flat surfaces. I heated my caliper fingers to get as close to the 2" mark and get flat surface contact. I have include the dxf of the parts in case someone want to improve on this.