Don't own a PST, but have. viper HD 10 x 42 binoculars, viper hd spotting scope , viper 2 x7 x32 on a 338 federal, viper hs 2.5x10x44 on a 25-06...... All Working good so far. Most guys I know using Vortex are having good luck . One friend is a avid LR guy and is running Vortex on his .338 Lapua. He shoots a ton....zero issues. Only time will tell.......as a Design engineer, you cannot continue to market sub par products, it will lays catch up with you. It will be interesting to see this play out..... Goodshot

Last edited by goodshot; 10/08/13.