The gun vice mentioned does allow for a quicker initial zero. This zero should then be " confirmed" by firing off a sand bagged rest! And Point of Impact (POI) should be verifed at different ranges. If it is absolutely impossible to find a range greater than 100 yards (that is becoming common in more and more places) than the 2" - 2 1/2" high at 100 yard should be acceptable for a " hunting zero" to approximately 250 - 300 yards. This is not an ideal situation but a situation more and more hunters are being faced with as " range space" becomes more and more limited.

If your hunting rifle has been " zeroed" at 100 yards in the above manner, and not checked beyond that range, it becomes imperative that you don' t shoot beyond 250 yards or so in a hunting situation. It is simply unethical to do otherwise under the circumstances. If you cannot confirm your POI at longer ranges....you should not be shooting at live game that is deserving of a humane death!!! And this is a point that can' t be made too strongly!

Another issue that deserves brief comments. After the initial zero from the vise....if you can' t confirm your zero from a sand bagged rest, (let alone talking about shooting from field positions), you should question your ability(ies) to be shooting at live game! We, as sportsmen(ladies), owe both the animal, and " sport hunting" a minimum standard of proficiency that insures clean and humane kills. Less than that is not only seriously unethical...but extremely damaging to the " image" of sport hunting, and its continued existence.

Enough " moralizing" on my part. Do the best job you can to zero your rifle properly....know it' s POI' s to all ranges you intend to actually shoot at live game....and insure you can actually place your shots there under " field" conditions.

Best of luck to you....good hunting!!!