Sighting in a rifle

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fuel80guy

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Ive mounted my scope and im ready to sight my gun in.
I need help on sighting my gun in.It is remignton 742 in 243 calibre.
I might be able to get a bore sighter.
If i dont get it bore sighted then do i start at 25 yards?
How high should i sight this gun in at 100 yards?
Im usiing remington express 80 grain psp bullets.
 
Yes, just put up a target at 25 yards. Sight it for dead on at 25 and it will be very close to an inch or two high at 100.
Depending on what you are after, would determine how high you set it at 100. Deer, I would go 2½ to 3, for coyotes, maybe only 1½ to 2.
 
I would try to sight it one inch low at 25 yards and then shoot it at 100 yards and adjust from there.

The scope is about 1.5 inches above the center of your bore, so if you were shooting high at 25 yards, you may be over the target at 100 yards.

I would think if you sight it about 2 inches high at 100 yards it would basically shoot point of aim out to about 300 yards.
 
The sighting dead on at 25 yards, to make it about right at 100, is an oldtime, common theory, that many of us have used for years. The first I heard about it was in the writings of Jack O'Connor. It will be very close with any bottle neck rifle case, with the scope about 1½ inches above the bore.
In getting to 100 yards the bullet will have a drop. To get the bullet to point of aim at 100 yards, it must rise above the line of bore. If this rise places the bullet on line of sight at 25 yards, it will be very close to the sighting we usually strive for, about two inches high at 100.
 
Well i mounted my scope and took the rifle out to shot.
1shot at 10 yards was about 4 inches low but dead centre vertically
2nd shot 2 inches high at 10 yards so i backed out to 25 yards and it was shooting low about 2 inches.
I sighted it in to 2 inches high at 25 yards.
I moved out to 100 yards and shot 6 rounds and not one shot hit the target.
any ideas??
i think i might just get it bore sighted to start.uuurghh:(
 
fuel80guy said:
Well i mounted my scope and took the rifle out to shot.
1shot at 10 yards was about 4 inches low but dead centre vertically
2nd shot 2 inches high at 10 yards so i backed out to 25 yards and it was shooting low about 2 inches.
I sighted it in to 2 inches high at 25 yards.
I moved out to 100 yards and shot 6 rounds and not one shot hit the target.
any ideas??
i think i might just get it bore sighted to start.uuurghh:(
Click to expand...

You were told to sight dead on at 25 yards! I told you this was an old shooters method and that I had personally used it successfully several times.
You don't listen, so Good Bye!
 
fuel80guy said:
1shot at 10 yards was about 4 inches low but dead centre vertically
2nd shot 2 inches high at 10 yards (
Click to expand...

:eek:

Is everything tight? Did the scope move? There is 6" difference between 1st shot and 2nd shot at 10 yards. There has to be a problem with the mounting! Unless you adjusted the elevation, but I don't think there is a scope developed yet that would have 6" of elevation adjustment at 10 yards.:eek:
 
a bore sighter will do you NO GOOD at this stage- what they're meant for is to PUT YOU ON THE PAPER at 25 yards- you've ALREADY done that- now you have to regulate your sights- if you take a look at a range table, you should see a column that says"FIRST CROSSES LINE OF SIGHT AT and then gives the yardage-TYPICALLY AT 25 yards, regardless of cartridge- then drop back to 100 and make your adjustments from there
single shots also tell you NOTHING it's the 3 to 5 shot GROUP that gives a true picture of what the rifle can do, and based on that GROUP you make your adjustments- get yourself a RELOADING MANUAL like a speer or whatever that has the tables in the back and it'll tell you what your drop is at various ranges depending on your velocity and your ballistic co-effeceint( - ok i went to the remington site and looked up your bullet- it's a.255- which means typically, it'll be 1.2 inches low at 200, and 3.3 inches low at 300, given a 100 yard zero-provided your ammo is going 3400 fps- which is a little optomistic but it's what i got from my tables
and i agree- there must be something loose- start with the rings( see if you can move the scope back and forth) then go on to the screws that hold the rings to the mount- they should be centered in the groove as well as tight- then ck the mounting screws to the gun- it's all got to be tight before you shoot
the other question is are you shooting from a rest or bench or just offhand?- that makes a difference as well- you NEED to be on a bench or rest and hunkered down as tight as possible
 
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when i go to sight in my 7mm later this year, i'll be sighting in dead on at 200 yards. alot of the places i hunt are open, meaning longer shots. by being dead on at 200 yards, i just aim lower at 100. i rarely get the chance to shoot at something 50 yards or closer, so i don't worry about it. if i wanted to shoot something that close, i'd use my bow. :D
 
fuel80guy said:
Well i mounted my scope and took the rifle out to shot.
1shot at 10 yards was about 4 inches low but dead centre vertically
2nd shot 2 inches high at 10 yards so i backed out to 25 yards and it was shooting low about 2 inches.
I sighted it in to 2 inches high at 25 yards.
I moved out to 100 yards and shot 6 rounds and not one shot hit the target.
any ideas??
i think i might just get it bore sighted to start.uuurghh:(
Click to expand...

Of course you shot over the 100 yard target. You were told how to do it and ignored it.

Can you read?

I would try to sight it one inch low at 25 yards and then shoot it at 100 yards and adjust from there.

The scope is about 1.5 inches above the center of your bore, so if you were shooting high at 25 yards, you may be over the target at 100 yards.
 
H4831 said:
Yes, just put up a target at 25 yards. Sight it for dead on at 25 and it will be very close to an inch or two high at 100.
Depending on what you are after, would determine how high you set it at 100. Deer, I would go 2½ to 3, for coyotes, maybe only 1½ to 2.
Click to expand...

I do the same thing only I go 1/2" low at 25 and usuaully puts me about 2" high at 100.
 
No one has asked an obvious question.......do you know how to shoot? I'm not being facetious, it's an honest question. I was at a gunshop a few weeks ago and this guy was complaining that the rifle he bought ( a cheap 770 in 300 mag) didn't shoot straight. He was #####ing that it shot low to the right all the time and couldn't understand since the shop had boresighted it when he purchased it. The kid behind the counter seemed at a loss for words so....being the shy introvert that I am :rolleyes:.....I asked him if it was his first rifle. Seems it was. I asked him if he was a member at a range where he can practice and if anyone could help him by teaching him how to shoot. Nope, not a member anywhere. So I told him to get a membership somewhere, explained that boresighting doesn't mean that the rifle is properly sighted in, like anything else it takes practice. That and a 300 mag doesn't really fit the bill as a good first rifle to learn with.......

Anyway there is no harm in stating that you may be a novice shooter, most folks around here will just try to help.
 
Whether it is dead on at 25 yards, or one inch low at 25, just changes it 4 inches at 100, and that amount is easily tweaked.
With the average rifle and scope setting, I will tend to agree with those that say dead on is a bit too high.
Depending on where you want it to hit at 100, anywhere from 1 inch low to dead on, won't be too far wrong.
 
oopswasthatyourdog? said:
No one has asked an obvious question.......do you know how to shoot? I'm not being facetious, it's an honest question. I was at a gunshop a few weeks ago and this guy was complaining that the rifle he bought ( a cheap 770 in 300 mag) didn't shoot straight. He was #####ing that it shot low to the right all the time and couldn't understand since the shop had boresighted it when he purchased it. The kid behind the counter seemed at a loss for words so....being the shy introvert that I am :rolleyes:.....I asked him if it was his first rifle. Seems it was. I asked him if he was a member at a range where he can practice and if anyone could help him by teaching him how to shoot. Nope, not a member anywhere. So I told him to get a membership somewhere, explained that boresighting doesn't mean that the rifle is properly sighted in, like anything else it takes practice. That and a 300 mag doesn't really fit the bill as a good first rifle to learn with.......

Anyway there is no harm in stating that you may be a novice shooter, most folks around here will just try to help.
Click to expand...

Awesome story. I am so glad I don't work in retail anymore. Some of the stupid things that people did were starting to frustrate me.
 
fuel80guy said:
Well i mounted my scope and took the rifle out to shot.
1shot at 10 yards was about 4 inches low but dead centre vertically
2nd shot 2 inches high at 10 yards so i backed out to 25 yards and it was shooting low about 2 inches.
I sighted it in to 2 inches high at 25 yards.
I moved out to 100 yards and shot 6 rounds and not one shot hit the target.
any ideas??
i think i might just get it bore sighted to start.uuurghh:(
Click to expand...

Don't get too confused with this. Do exactly what H4831 told you and you shouldn'd have a problem. I've used this method for years sighting in many new scopes and it always worked out fine, four to five shots and the rifle is sighted in to where I want the bullet to hit at 100 yards. Before you start make sure your scope mounts are tight. Good Luck.;)
 
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