I have that issue of Guns and Weapons from 2005 because in February of that year I purchased my first PTR91. It was s/n A132x. This rifle is very accurate and currently sports a Cherokee Accessories cheekpiece, Harris bipod, Hensoldt Z24 scope, and Bill Springfield trigger job. The only issue I ever had from it was that after about 150 rounds of South African surplus ammo, the residue would cause the action to stop. A short cleaning time with some Hoppe's #9 solvent would put me back into action for another 150 or so rounds. This ammo was some of the so-called "tar sealed" ammo that gave trouble to a lot of 91 owners. (I even spoke with a fellow who owned an original HK91 which seized up with the gunk from this ammo.) My gun would run forever on Portuguese, Santa Barbara, Pakistani, and American Eagle ammo. (Never tired any other ammo.) But back to your question at hand. I remember all the discussions here and on other boards about the very early PTR rifles having minimum chamber specs that caused issues with surplus ammo. These early rifles (the ones referenced in the second to last paragraph in G & W) were those with serial numbers below A600. This A1200 rifle is good to go. The only drawback that I see is the price. I would think $900 is more of what the market is showing.