I doubt you could tell much difference with a surplus rifle in the woods.
But why not shoot the gun and find out?
And just to inject another variable that matters to hunters and snipers; where does your rifle shoot cold and clean, cold and fouled, warm and fouled? It takes a lot of work to get a real deal cold clean zero. Some people dodge the question by shooting slowly to get a cold fouled zero, clean the gun, and then fire a couple of fouling shots. Put it away with a little soot in the barrel so it will be predictable when needed. Of course that needs checking periodically to see if the fouling ages, doesn't it?
A target shooter will KNOW and either disregard his first sighter shot or know how much difference there is and allow for it so as to get started adjusting for the day's conditions.