Caldwell

Caldwell makes the equipment that removes the shooter from the equation: front rests, rear bags, chronographs, recoil-reducing shoulder systems and the Lead Sled that lets a heavy magnum rifle be sighted in without a flinch developing. If you have ever zeroed a rifle at a public range, you have probably used their gear.

Their chronographs deserve specific mention, because velocity data is what turns a ballistic calculator from a guess into a tool — advertised muzzle velocities are measured in test barrels and are routinely 100 feet per second off what your rifle actually produces. The rests are the other half: group differences between loads are unreadable until your own wobble is taken out of the measurement.