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Xtreme Hardcore Rail
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<blockquote data-quote="WildRose" data-source="post: 792396" data-attributes="member: 30902"><p>Sighting through the bore to the line is doing nothing but adding a step that doesn't matter. You have no means by which to ensure it is passing straight between 12:00-06:00 other than "eyeballing it".</p><p></p><p>If your receiver is milled so poorly you are going to have an issue leveling off of the top of it, I can't see how you can correct such an error by leveling through the bolt raceway.</p><p></p><p>All you are doing essentially here is eye balling the bore alignment to ensure that both the scope and bore are aligned similarly left to right.</p><p></p><p>If the top of your receiver is off, then you will not get proper squaring no matter where you choose to set your level, but, if you use a level on the top of the receiver/rail and align your vertical crosshair with it, you will be square and level.</p><p></p><p>The top of the reciever becomes the cross of an upside down T when you mount the scope. If it is milled with a left to right can't to it, no matter what you do above or below it you will still be slightly off center because the leg of the T is essentially your vertical cross hair which is then leaning left or right.</p><p></p><p>No matter what, it is then out of center to the bore. You will know this as soon as you mount the rail because the rail will twist as you torque it down.</p><p></p><p>If you are using your raceway to level from you will also know instantly whether or not the top of your receiver is out of square when you level the rail anyhow.</p><p></p><p>If it's out of square enough to matter you are already screwed because as I said above unless you shim it to square it your scope will never be centered exactly above the bore no matter what type of mounting system you are using.</p></blockquote><p></p>
[QUOTE="WildRose, post: 792396, member: 30902"] Sighting through the bore to the line is doing nothing but adding a step that doesn't matter. You have no means by which to ensure it is passing straight between 12:00-06:00 other than "eyeballing it". If your receiver is milled so poorly you are going to have an issue leveling off of the top of it, I can't see how you can correct such an error by leveling through the bolt raceway. All you are doing essentially here is eye balling the bore alignment to ensure that both the scope and bore are aligned similarly left to right. If the top of your receiver is off, then you will not get proper squaring no matter where you choose to set your level, but, if you use a level on the top of the receiver/rail and align your vertical crosshair with it, you will be square and level. The top of the reciever becomes the cross of an upside down T when you mount the scope. If it is milled with a left to right can't to it, no matter what you do above or below it you will still be slightly off center because the leg of the T is essentially your vertical cross hair which is then leaning left or right. No matter what, it is then out of center to the bore. You will know this as soon as you mount the rail because the rail will twist as you torque it down. If you are using your raceway to level from you will also know instantly whether or not the top of your receiver is out of square when you level the rail anyhow. If it's out of square enough to matter you are already screwed because as I said above unless you shim it to square it your scope will never be centered exactly above the bore no matter what type of mounting system you are using. [/QUOTE]
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