I want to sight my rifle in @100 yards to dead on at 300 yards. How high does it need to be sighted in?

Answer 1

The only reliable way to sight your rifle/ammo combination at 300 yards is to test fire it at 300 yards.

Anything you do at 100 yards will be an approximation. In order to do the estimate, you need the ballistics at various distances of the exact ammo you are using. With drop data at 100,200,300 etc you should be able to roughly estimate how high you need to be at 100 to be close at 300.

The critical factor is the ammo you are using.....likely the factory website will give you the drop ballistics......

Answer 2

As people mentioned, it depends on many variables such as bullet weight, velocity, ballistic coefficients, etc...

A 170 gr. flat nose bullet out of a 30-30 Win will have a much different flight path than a 165 gr Ballistic Tip out of a 30-06.

For higher velocity rounds shooting pointed bullets (308 Win, 30-06, 270 Win, 243 Win, etc...), I would sight in roughly 2 inches high at 100 yds. This should put you about on-target at 200 yds and probably 3 inches low at 300 yds.

However, I would highly discourage only shooting at 100 yards at the range and then shooting at an animal 300 yards away. Long distance shooting takes practice. A slight jerk of the trigger might only throw a bullet off by 0.5 inches at 100 yards, but it may be 1.5 to 3 inches at 300 yards.

At longer ranges, your target looks different through the scope as well. The wind makes the target move around in the scope.

Anyway, enough preaching...good Luck!!

Answer 3

Determine which ammo you will be using first. Once you are zeroed to 100 yards do not switch from that brand and weight of bullet. Go to the ammo manufacturer web site and see if they have the ballistics data for your bullet. Most of the majors do. The data there will get you very close at 300 yards. With the differences in rifles and shooting conditions the only way to find DEAD zero is to throw a few at 300 yards.

Answer 4

it does depend on the caliber, the weight of the bullet and type of bullet. I sighted my 270 winchester 2 inces high at 100 yards. this gave me the same point of aim out to 300 yards. But again, it differs as I said.

Answer 5

It of course depends on the caliber, load, bullet weight, and even the rifle itself, but 1" high at 100 yards is a good starting point. Remington's website has some good ballistics comparisons that might help you set it up faster.

Answer 6

I'm with DJ on this. If you plan to shoot at 300, you'll have to shoot at 300. Using a theoretical vital zone of 4", for deer-sized game, I usually chrono my loads and compute approximate point blank range, then shoot to confirm. Once I have all that done, usually a manufacturer discontinues one of the components and I have to work up a new load, new ballistics, and new zero, just as a corollary of Murphy's law.

Answer 7

at 100 yards, with a 30-6, 3 inches high will put you at 300 yards. you can look at a balistics chart. it really depends on what type of rifle you are using.

Answer 8

Be glad to give you such info but I need the caliber of the gun, its muzzle velocity and the ballistic coefficient of the bullet. With that info, I can go to my tables and look up the info for you.

Answer 9

2.5- 3.0 inches high at 100 yrds will put you dead on at 300 yrds. Good luck and Shoot straight

Answer 10

DJ and WWD have this one right the ONLY way to know what it will do at 200,300,400,500,600,700,800 ect is to shoot at those ranges anything other than shooting at that range is guessing