Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Chatting and General Stuff
General Discussion
Bubble level for rifle
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Dave King" data-source="post: 40965" data-attributes="member: 3"><p>4mesh063</p><p></p><p> The chart shows angles to 90 degrees... Tactical shooters shoot at all types of induced cant angles. Shoot through a slightly opened window, from under a car or truck, through a loop-hole where a piece of siding has been pried loose. 90 degrees of cant is not an uncommon encounter at a sniper match.</p><p></p><p> All the "drop" belongs in the chart as I see it. When shooting with Zero -0- cant and 78 inches of up elevation the max ordinate will probably be (this is a SWAG and not calculated data) 2/3rd's that value or about 50 inches. What I believe you're trying to say is that's the most can't error or "lost" drop we can consider. I disagree and here's why. The elevation we place on the scope (or any sighting device) is to overcome gravity. We need 78 inches of up to overcome 78 inches of down "fall" the bullet (projectile) will experience over the TOF required to get to 500 yards.</p><p></p><p> The max ordinate is of little consequence except for figuring wind if you're shooting where the projectile will rise above surrounding structures and the possible need to thread the bullet under or over an intermediate obstruction (bridge, house, tree, etc.).</p><p></p><p> If I place enough elevation on the sighting system to compensate for the 78inches of drop and then rotate the weapon 90 degrees I get two (2) projectile deviations from my POA. The projectile will "fall" vertically 78 inches for the already determined TOF and it will be displaced 78 inches to the side(horizontal) by the "old" elevation set into the sighting system. Your bullet will strike 78 inches low and 78 inches to the side for a 90 degree cant.</p><p></p><p> Gotta go... I'll be back!</p><p></p><p> Here's another look at those pictures.</p><p></p><p></p><p>How are you going to "square-up" the crosshairs on this elk before you shoot?</p><p></p><p></p><p>Pict 1 then Pict 2</p><p> <img src="http://the-king-family.com/UserPages/DaveKing/elk-snow-3-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://the-king-family.com/UserPages/DaveKing/elk-snow-4-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>P.S. Found my Seekonk torque wrench...UPS had it and kindly left it at my door. My wife might believe this for a while, until the credit card bill comes ($112.00 or so, it's expensive for overnight shipment!) Now... where's that other stuff <img src="http://images/icons/confused.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> )</p><p></p><p>[ 03-05-2004: Message edited by: Dave King ]</p></blockquote><p></p>
[QUOTE="Dave King, post: 40965, member: 3"] 4mesh063 The chart shows angles to 90 degrees... Tactical shooters shoot at all types of induced cant angles. Shoot through a slightly opened window, from under a car or truck, through a loop-hole where a piece of siding has been pried loose. 90 degrees of cant is not an uncommon encounter at a sniper match. All the "drop" belongs in the chart as I see it. When shooting with Zero -0- cant and 78 inches of up elevation the max ordinate will probably be (this is a SWAG and not calculated data) 2/3rd's that value or about 50 inches. What I believe you're trying to say is that's the most can't error or "lost" drop we can consider. I disagree and here's why. The elevation we place on the scope (or any sighting device) is to overcome gravity. We need 78 inches of up to overcome 78 inches of down "fall" the bullet (projectile) will experience over the TOF required to get to 500 yards. The max ordinate is of little consequence except for figuring wind if you're shooting where the projectile will rise above surrounding structures and the possible need to thread the bullet under or over an intermediate obstruction (bridge, house, tree, etc.). If I place enough elevation on the sighting system to compensate for the 78inches of drop and then rotate the weapon 90 degrees I get two (2) projectile deviations from my POA. The projectile will "fall" vertically 78 inches for the already determined TOF and it will be displaced 78 inches to the side(horizontal) by the "old" elevation set into the sighting system. Your bullet will strike 78 inches low and 78 inches to the side for a 90 degree cant. Gotta go... I'll be back! Here's another look at those pictures. How are you going to "square-up" the crosshairs on this elk before you shoot? Pict 1 then Pict 2 [img]http://the-king-family.com/UserPages/DaveKing/elk-snow-3-1.jpg[/img] [img]http://the-king-family.com/UserPages/DaveKing/elk-snow-4-1.jpg[/img] P.S. Found my Seekonk torque wrench...UPS had it and kindly left it at my door. My wife might believe this for a while, until the credit card bill comes ($112.00 or so, it's expensive for overnight shipment!) Now... where's that other stuff [img]images/icons/confused.gif[/img] ) [ 03-05-2004: Message edited by: Dave King ] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Chatting and General Stuff
General Discussion
Bubble level for rifle
Top