Pyro does not take mini-crit damage from their own reflected explosives. Players will never deal critical damage to themselves under any circumstance.

Reflected grenades, sentry rockets, and detonator flares deal 85-170 self-damage. Normally, grenades deal 37.5-75 self-damage, sentry rockets deal 50-100 self-damage, and detonator flares deal 15-30 self-damage (22.5-45 with item penalty).

This happens because they use the flamethrower's "Damage" value of 170 (which is approximately equal to max flamethrower dps). Editing this value does not change the flamethrower's damage, but it changes the self-damage for these reflected projectiles.

From scripts/tf_weapon_flamethrower.ctx:
   "Damage"        "170"    // per second

With the Dragon's Fury, reflected grenades, sentry rockets, and detonator flares deal 45-90 self-damage. This is because its "Damage" value is 90, which also does not change the weapon's actual damage when edited, but changes the damage for reflected projectiles.

From scripts/tf_weapon_roc…