It's definitely possible. There is little if any history on these rifles and what happened to them after WWII.
I recall the information as to their manufacture from the Mosin Nagant Collectors website. They interviewed a plant supervisor in charge of building up the sniper rifles. He said that demand was so high, they just didn't have time to go through long drawn out processes to qualify them before building them. One thing he mentioned, "if they came in the door on a truck on Monday, by Friday or Saturday, they were finished, sighted in and either stripped of their sniper accoutrements if they didn't perform right away or were as in most cases shipped. He felt 4 - 7 days turnaround time was normal under wartime production circumstances. The Soviets had worked out the bugs in their sniper rifle production, long before any of the other combatants in WWII. They were the only government and military that understood how much of a force multiplyer a properly trained or even self motivated individual could be, until later in the conflict.
It doesn't take a lot to understand their thinking either. Mosins are generally very accurate rifles. Even after numerous FTRs or being beat to hell. I have an original Mosin Sniper that doesn't have one bit of finish left on any visible surface. Under the stock, there is some. The bore is almost perfect and it is a tack driver, with the right ammunition. It will group into 2 1/2 MOA right out to 500 yards, if I do my part right.
It is beaten and dented and to tell the truth, looks like its been to hell and back but dragged on the ground by the sniper all the way there and back. Whoever carried it though, took very good care of all the right stuff. The rifle has seen some rough use but was never abused. That says a lot for the system. There was a very good reason the Soviets stuck with the Mosin 91 system. It worked, first time, every time. It was as accurate as anything being used against them and as tough or tougher than most. Even the most illiterate grunt could master it and its maintenance quickly.