Hornady Annealing Kit - Manual (Page 4)

BENEFITS OF CASE NECK ANNEALING
When case necks become work hardened and brittle due to repeated firing and
resizing, annealing effectively extends case life. Within any batch of fired cases,
variations in neck hardness will be found. This variation in hardness contributes
to variations in bullet pull. Proper annealing reduces this variation and improves
the uniformity of bullet pull, which can improve accuracy. When creating wildcat
cartridges by necking up or necking down various cases, neck and shoulder
annealing greatly eases the case conversion process and reduces losses from
neck splitting or folding.
Hornady offers this tool kit complete with three basic tool components.
One fits small rifle cases like the .222 and the .223 caliber cases; one fits
medium rifle cases like the .243, .308 and 30-06 family; and one fits the
H&H magnum family. Before proceeding, ensure that you have the correct
tool for the case type you intend to anneal. Insert the head end of a test case
in the tool. The case should freely enter the tool without excessive side play.
Further, the case should enter the tool so that a minimum of 1/2” length of
case body is hidden within the aluminum housing. Cases shorter than 1” from
base to shoulder must be annealed by other means. Once you have chosen
the correct tool, proceed with the following instructions.