Check the listing for details. # 20 Hornady Comparator INSERT for B2000 Lock-N-Load, .204 diam. 20 Cal. C1420. Condition: New. Listed at 13.84 USD. Hornady B2000 Bullet Comparator Insert ONLY Steel # 20 / C1420 / 14-20 .204 diameter .20 Caliber The Hornady Lock-N-Load Bullet Comparator is perfect for the reloader looking to quickly and precisely measure seating depth of loaded ammunition from the bullet ogive to the base of a loaded round, to eliminate variation in seating depth. This caliber specific Bullet Comparator Insert is required to use the tool, and are available from 172 Diameter all the way up 458 Diameter. The Comparator Inserts allow you to measure the bullet from the base of the cartridge to a specific point on the ogive, which has little to no variation. When used in conjunction with the Hornady Lock-N-Load Overall Length Gauge (Sold Separately) the reloader is able to determine the exact bullet seating depth for the ultimate precision. Function: Designed to be used with the Hornady Lock-N-Load Bullet Comparator and the Hornady Lock-N-Load Overall Length Gauge (Sold Separately) Notes: This is only the Insert for use with the Bullet Comparator. The bullet comparator is sold separately ~~~~~~~~~~~~~~~~~~~~~~~~~~ We are unable to accept returns on used, fitted, or altered parts. Returns must be in new, unused condition and in their original packaging.