Remington Pump 308 with HS403G on accessory rail
Bushnell Elite with SCTM-21 accessory Picatinny rail with HS403G mounted

PARA .45 ACP 2000 rounds. No problem.
IPSC Open class. Major power factor.

Norinco T97 with 403G

High Standard Victor with HS403A
10 rounds, CCI Standard velocity, 50' range, with bean bag rest. Note the dime to show scale. The point of impact of the site is no longer a variable, now its just the ammunition, the firearm and the shooter!