I had never heard of bubinga until your post so i looked it up..the gum pockets hopefully wont be in your wood.

Pics of rifle blanks show it to be 'blooody nice wood"

About Bubinga Lumber:

Botanical Name
Guibourtia Demeusei

Other Names
African Rosewood, Essingang, Buvenga

Mechanical Properties
Low steam bending characteristics and exudation of gum pockets can be troublesome.

Working Properties
Works easily with hand or power tools. Reduced cutting angle recommended for interlocked grain. Moderate to severe blunting of cutters. Pre-drilling required for nailing. Gluing can be difficult due to gum pockets. Stains easily and can be brought to an excellent finish.

Durability
Moderately durable. Susceptible to attack by common furniture beetle. Heartwood is resistant to preservative treatment. Sapwood is permeable.

Seasoning
Dries easily with little degradation, although it will exude gum. Stable in use.

Uses
Primarily used as a veneer for cabinetwork, furniture, and paneling. Also used for knife handles, and fancy goods.

Comments
Rotary cut veneer is known as "Kevasingo" and has wild, swirling, veined figure