handloading

Short definition from Wiktionary

Noun

1. 1
   The loading of cartridges for firearms when it is done by hand and (especially) at home (in semi-homemade manner): assembling them from the individual components (e.g., casing, primer, gunpowder or other charge, and shot or bullet).
2. 2
   The loading of a firearm, usually a pistol or rifle, by hand.

Verb

1. 1
   present participle and gerund of handload