zeroing

[Guest baldie]

f**k me, we,ve all agreed, in a roundabout way remember, only by discussion, and sometimes argument, do people learn.

[mel b 2,720]

primary and secondary zero , i zeroed the .243 today paul , cracking piece of kit for the money

[midnight 657]

question lads.

does the same aply for lazer sights ? i mounted one couple of years back just for fun it was smack on at 10 meters benched (it was a cont to zero) but after that i couldnt trust it to hit shit all. it was fitted to a 177 so this could be the big problem.

 

i was left thinking it was only any good for mesured targets as anything below or beond was of zero.

a total waste of money and bloody usles piece of kit.

[Guest baldie]

You should have had a secondary zero at around 35 yards?Lasers are usefull for rangefinding with.

[Fledge 0]

Right, i,m gonna eat a large slice of humble pie, and apologise unreservedly to whippet here.He is technically correct, regarding the law of gravity, which he is loosly demonstrating. After a bit of research, i have come up with the drawing, i can remember seeing in all the mags etc, showing a bullets trajectory. This is where we are both correct, but in a different way. If a bullet it fired from a perfectly horizontal barrel, it can do nothing but drop, on exiting the muzzle,but this is not the way a gun is used, or zeroed. A rifle is usually fitted with a scope, which on average is 1 1/2" above the bore [line of sight]Given that a rifle is shot for zero, the line of sight will be perfectly horizontal to the target, therefore to hit the bull, the bore will be angled upward, and the bullet will be fired upward through the line of sight, and will then drop back through the line of sight, at the 2nd zero point [which is the one chosen] thus this gives two zero points.If you really want confusing, throw in some uphill or downhill shots .........bollocks, no, i,m not going there

 

Sorry to but in lads.What is actually happening is,pellets do NOT rise.From the moment the pellet leaves the muzzle it is DROPPING.The pellet flies in a downward arc,dropping more quickly as the pellet loses speed due to air resistance.If you zero the rifle at a given distance(say 30 yards)in order to hit the target zero you will actually have to shoot upwards to allow for the pellet dropping.Now if you draw a horizontal line between the scope and the target the pellet will actually cross that line twice (on the way up and on the way down)hence the scope will in effect have two zero points.My explanation is a bit crude but i hope explains the two zero point theory.

 

I go along with the above 2 comments think that makes you all [bANNED TEXT] lol

 

Intresting posts lads cheers

 

I thought i had all this sussed with my springer an cheep scope was confident on hitting [bANNED TEXT] i shot at a most ranges....bought a fancy pre-charge and posh scope and its start all over again

[Guest Dave]

hi,everybody talking to a bloke yesterday he said if you zero your .22 airrifle at 10yds he says it will be bang on at 30yds is this true?just curious anyone heard this before?

 

 

It is dependant on so many factors. first of all all .22 pelets dont take the same trajectory. trajectory is dependant on several factors such as Muzzle Vellocity, weight of projectile, projectile profile. It is also dependant on scope eye releife how high the scope mount is etc

 

What would be a more accurate statement might be you have an initial point of zero between 8 + 14M when you are zerod at 30m when using an air rifle with close to the legal limit with normal scope mounts on it.

 

Dave

 

PS there are plenty more variables that i have not listed.