What is the proper way to sight in a scope?

So I am wanting to know if I sight my scope in at 25 yes will be accurate at 250+ yards? I don't have access to more than 25 yes for the sight in. When we get to where were going I am not allowed to sight it in so it needs to be done. Is there any adjustments I would need to make if it's sighted in at 25 yes to make it accurate at further distances? It's .308 lapua and the barrel length is 24"
Answers

Anonymous

Well Sparky don't you think we might need to know the CALIBER and load for this rifle? Barrel length will probably help too. a 308 Lapua?? Well Sparky you've got an extremely rare rifle there, matter of fact you most likely have the only one. You should take this mysterious rifle and shove it up to your elbow up your own exit ramp.

Mj

Sighting at 25 yards for long range shooting is largely a waste of time.try to find a long range shooting location. Ballistics charts can assist in predicting trajectory.

falconry2

No, sighting in at 25 yards isn't going to do you much good at even 100 yards except you might be on paper. Sight in at 100 yards, with a 308 Win rifle and 150 or 165 grain bullet you sight in to be 2 inches high at 100 yards to expand your envelope. Scopes use 1/4 MOA usually, that means @ 1 inch per 4 clicks at 100 yards BUT that doubles at 200, triples at 300. So, if you sight in ZERO at 25 yards, every click is moving the ZERO 1 inch. That isn't going to translate to reliable accuracy at 100 yards even because at 25 yards the ballistic curve of the rifle isn't established enough to predict the drop out farther. I reload for rifles, work up loads for new ones or when I need to change components/powders, as do many of my friends; none of us use or recommend less than 100 yards for sighting. EDIT: You need to research external ballistic factors much more to understand the hows and whys of sighting in, how different processes affect accuracy. There is the standard ballistics curve, scope vs barrel line of sight, take the difference between the straight scope line and the bullet arc during flight in consideration of the barrel loft. A rifle bullet normally traverses the scope line of sight twice, once going up because of loft, then descending with gravity and drag. If you do intend to shoot to be accurate at 250 yards it certainly makes sense to sight in to accomplish that. You should look up Max Point Blank Range (MPBR) for your cartridge(s). I sight in for a ZERO at 200 yards, that makes a 300 yard shot very workable with little drama and even farther with known holdover and practice. Ideally, you ZERO where the scope and bullet drop match on the decent, but that can be extended (MPBR). Verticle change is only part of the sighting equation, still need lateral adjustments and at 25 yards the adjustments are just too coarse. I get Sub-MOA accuracy in my bolt rifles with reloading and I'm not that intense about stuff like real hardcore shooters might be.

Homer Bufflekill

Nothing will replace firing a weapon, find a range. Also...if you do have a Lapua, I'm guessing its a 338, not a 308, but its your buIIshlt story, tell it however you want.

USAFisnumber1

I use a Busnell scope aligner that you stick in the barrel at the front. That gets the scope level and pretty much aligned left to right. Then I use a laser cartridge and aim at 200 meters and line up the scope to that point. Then I start firing rounds to see where they actually hit and adjust the scope as needed. Beyond 200 meters you really start seeing bullet drop.

zipper

If you sight in at twenty five yards at 250 you will be about a foot under point of aim or more. At twenty five yards you are just got the scope lined up, and you could be off at one hundred yards low and to the left or right; at twenty five yards the dote covers to much of the bulls eye to set wind-age correctly.

lili

Sighting at 25 yards for long range shooting is largely a waste of time.try to find a long range shooting location. Ballistics charts can assist in predicting trajectory.

Robin

the elevation would need to go up

John

25 yards? What does it have? A six-inch barrel? Nobody sights a rifle in at 25 yards unless it's a short-barrel carbine that fires pistol ammunition. You can't "interpolate" 25 yard dead-on hits and raise the elevation up to compensate so that it will hit dead on because it is going to hit dead on at 25 yards and trying to estimate the compensation is very difficult. You'll have to shoot the target at 100 yards and compensate the elevation at EXPECTED trajectory at 250 yards so that the shots go above the 100 yard mark by so many inches.

Mr.357

You would probably be better off bore sighting it. I bore sighted my AR-15 and it was on at 300 yds.

yimi

At 25 yards it will be on zero at 250. I am sorry you do not have the knowledge required to understand trajectory and it's effect on bullets. Giving false info just ruins this section.

Anonymous

At 25 yards it will be on zero at 250. I am sorry you do not have the knowledge required to understand trajectory and it's effect on bullets. Giving false info just ruins this section.