That's 20 rounds for $39.95. I am certainly not paying $2 per round.
My 10mm choice for self defense against humans is
Link Removed for $0.85 per round with
1,180 fps and 556 ft-lbs out of a 4.75 in barrel and with
17.1 in penetration and 0.656 in expansion in denim-covered gel. More 10mm ammo tests can be found
here.
If more power is needed,
Underwood has decently-priced full power 10mm ammo. For example, the
200 Grain Hard Cast Flat Nose round clocks in at 1250 fps with 694 ft-lbs out of a 4.75 in barrel. A perfect woods load for $0.80 per round. If needed, Underwood has also the
full-power 200 Grain XTP JHP round at 1250 fps with 694 ft-lbs out of a 4.75 in barrel. The price tag is $0.81 per round.
I have a Glock 20 Gen 4 with the
Lone Wolf extended 2-port barrel. For practice shooting, I use full-power
180 Grain Underwood FMJ ($0.60 per round) and
180 Grain LAX Ammo FMJ ($0.44 per round).