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kentucky hareraiser Super Member
Joined: Oct 27, 2006 Posts: 325 Location: kentucky
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Posted: Mon Jul 06, 2009 5:56 pm Post subject: dead on at 25 yds. |
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will put you dead on at 100 yards .. anything to this ? had a neighbor that told me this today and he says he was on a rifle shooting team long ago. i think he said he was shooting a 308 win. ..now i've never heard anyone say this or anyone who's one this .have y'all?? what i got to thinkin' where would 1" high at 25 yards put you then.. i'll wait till he gets home from his vacation and hit him with that one . i'll let you know what he says
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fnuser Super Member
Joined: Dec 23, 2008 Posts: 914 Location: S.W. Missouri, U.S.A.
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Posted: Mon Jul 06, 2009 6:45 pm Post subject: Re: dead on at 25 yds. |
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dead on at 25 yrds puts you high at 100 and back to zero around 200-250 with alot of cartridges including .308 win
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gelandangan Super Member
Joined: May 07, 2006 Posts: 6398 Location: Sydney Australia
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Posted: Mon Jul 06, 2009 8:14 pm Post subject: Re: dead on at 25 yds. |
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At scope height of 1.5 inch
a projectile with BC at about 0.320 traveling at just about 1800 fps
would be dead on at 25 yards
0.78 in high at 50
0.79 at 75
and dead on at 100
found out using Point Blank < thanks again DallanC
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chambered221 Super Member
Joined: Aug 17, 2007 Posts: 3455 Location: Lost for good !!!
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Posted: Mon Jul 06, 2009 8:38 pm Post subject: Re: dead on at 25 yds. |
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This must be one of those old wise tails or urban legends !!! (or maybe stupidity for some)
I’ve seen guys wasting ammo more than just a few times trying to perfectly center the bull at 25 yards.
The funny part is when they move out to 100 yards and don’t hit the bull they go back to 25 yards.
I asked a guy one day why he didn’t just sight in at 100 yards...............I was the stupid one that day !!!
_________________ Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!
A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
~George Washington |
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Bushmaster Super Member
Joined: Jun 12, 2005 Posts: 11393 Location: Ava, Missouri
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Posted: Mon Jul 06, 2009 8:53 pm Post subject: Re: dead on at 25 yds. |
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I have heard this and have seen it. But I was also told that it depended on the rifle and the shooter as to whether it would work. Technically it is correct.
_________________ I have one nerve left and yer standin' on it...
DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote... |
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Pumpkinslinger Super Member
Joined: Sep 22, 2007 Posts: 5002 Location: NC foothills
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Posted: Mon Jul 06, 2009 10:13 pm Post subject: Re: dead on at 25 yds. |
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Just this past weekend we sighted in four rifles; two ARs in .223, a Rem 700 in .260 and a Marlin 1895 .45-70. We started at 25 yds and got them close, then moved the target out to 100 yards. The first three were a few inches high and the .45-70 was a few inches low. We tweaked from there.
_________________ Mike
"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle |
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SingleShotLover Super Member
Joined: Dec 26, 2007 Posts: 1005 Location: Illinois
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Posted: Tue Jul 07, 2009 5:14 am Post subject: Re: dead on at 25 yds. |
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Pumpkinslinger seems to have the idea the way I always understood it. You can't depend on it being "right on" at 100 when sighted for 25, but you will be on the target. I think this all started before the various types of boresighters became common. It is a quick way (and less costly) to make sure you are at least on paper at 100 yards without a lot of shoot and guess. Fine tuning comes then. Of course with boresighters a person can now pre-sight and be on paper at 100 yards (unless something is really wrong).
_________________ If you can't hit it with one, you probably can't with two either!
The biggest problem with a closed mind is that it never seems to come with a closed mouth.
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Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
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Posted: Tue Jul 07, 2009 7:23 am Post subject: Re: dead on at 25 yds. |
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Roughly speaking yes. but like Mike said it will save you some ammo and get you on paper if you have never zeroed the weapon.
After I had a 100 yard zero, I used Point Blank to calculate my sight settings for my service rifle competition gun for 200-300 and 600 yards. and was in the black but not the X-ring at all distances. You have to shoot it at the distance you intend to use to do the fine tuning. Plus environmental factors will cause different point of impact so you have ot know the weapon. If it is hot or cold, humid or dry, sea level or mountains, flat or hills, sunny or cloudy will all change your zeros' slightly.
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
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pth1947 Member
Joined: Aug 29, 2005 Posts: 54 Location: southern Arkansas
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Posted: Tue Jul 07, 2009 7:29 am Post subject: Re: dead on at 25 yds. |
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If you shoot a 308 with open sights 1 in low at 25 yrds you will be on at 200 yrds You will be 2-3 ins high at 100 yrds because because the round travels in an arch. It works the same with a scope you have to fined how low to hit at 25 yrds. what you want is an arch that rises no more 4 ins out to your zero.
I have a 30-06 with a scope it is zeroed for 250 yrds at 25 yrds it is 1/2 in low at 100 it is 4 ins high. all I have to do is aim dead on and I'm in the 6 in killing zone of a white tail
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Pumpkinslinger Super Member
Joined: Sep 22, 2007 Posts: 5002 Location: NC foothills
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Posted: Tue Jul 07, 2009 11:46 am Post subject: Re: dead on at 25 yds. |
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As for the bore sighting... The one time someone did that for me (I bought a scope and the shop offered to mount and bore sight it for free) I found that my shots were about 1 foot right and 1 foot low at 100 yards. Luckily I had a BIG new piece of cardboard as a target backer. Maybe the guy did something wrong but I wasn't overly impressed. Let me be the first to say that this is only one experience, I haven't used a bore sighter before or since because I don't have one.
_________________ Mike
"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle |
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skb2706 Member
Joined: Apr 10, 2006 Posts: 269
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Posted: Tue Jul 07, 2009 12:15 pm Post subject: Re: dead on at 25 yds. |
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The fastest way I found to sight in a rifle is to first sight it in on paper at 25 yds. Remember that 1/4 " off at 25 is at least an 1" off at 100. Typically a varmint/big game rifle that hits POA at 25 will be "on paper" at 100. Make minor corrections and all will be good.
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chambered221 Super Member
Joined: Aug 17, 2007 Posts: 3455 Location: Lost for good !!!
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Posted: Tue Jul 07, 2009 12:32 pm Post subject: Re: dead on at 25 yds. |
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Paid twice to have someone bore sight a scope, neither time was even close !!!
Took a 3 foot by 3 foot piece of cardboard to the range one day to sight in a scope, when I started down range another guy there seemed to think it was the funniest thing he ever saw. When I got back from hanging it at 100 yards he was still laughing and offered his assistance and suggested I start at 25 yards.
First shot on the cardboard way off the intended target. Second shot just off the bull. Third, right in the 1 inch bull.
I just looked up smiled (knowing he had been watching through his spotting scope) and thanked him for his offer and let him know I wasn’t going to need his help.
_________________ Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!
A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
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shrpshtrjoe Super Red Neck Member
Joined: Jan 26, 2005 Posts: 2965 Location: Maryland
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Posted: Tue Jul 07, 2009 1:15 pm Post subject: Re: dead on at 25 yds. |
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I have a laser bore sighter I use but I still start at 25 yds . I bore sighted my .308 last saturday and was a foot high at 25yds
Joe
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whittling Super Member
Joined: Apr 21, 2008 Posts: 586 Location: Texas (home state is Mass)
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Posted: Tue Jul 07, 2009 1:41 pm Post subject: Re: dead on at 25 yds. |
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I say stick to 100 .Its easier to correct and more accurate.
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SingleShotLover Super Member
Joined: Dec 26, 2007 Posts: 1005 Location: Illinois
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Posted: Wed Jul 08, 2009 5:41 am Post subject: Re: dead on at 25 yds. |
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The point of any boresighter is to get you on paper so that you can make fine adjustments to suit your shooting style and distances. They should never be used as the only adjustment tool...they just aren't that accurate. Properly used, they will get you somewhere on a decent sized target. After that the rest is up to you. Because the accuracy of a boresighter depends on the barrel stud being tightened exactly the same each time, even with care mine seldom gives repeatable settings, but it is always at least close enough to allow me to finish the job at my chosen zero.
_________________ If you can't hit it with one, you probably can't with two either!
The biggest problem with a closed mind is that it never seems to come with a closed mouth.
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