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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
MPI shifts.....I have a problem!!
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<blockquote data-quote="Brown Dog" data-source="post: 77870" data-attributes="member: 1622"><p>Grateful for any ideas/ advice as to what's causing the MPI shifts I observed today:</p><p></p><p>I zero at one distance. </p><p>Move to a new distance; dial my anticipated come-up; and hit high &amp; right.</p><p>Happened repetitively today. Happened to me on 2 previous occasions. Never figured out what it was that time either!</p><p></p><p>The resulting comeups are a nonsense; 308 165BT @ 2720fps</p><p></p><p>I would expect (0.1mil clicks):</p><p></p><p>100yds.........200yds..........300yds</p><p>0.................4.9clicks......13.9clicks</p><p></p><p>What today gave was:</p><p></p><p>100yds.........200yds........300yds</p><p>0.................2 clicks......8 clicks</p><p></p><p></p><p>opening group at 100yds:</p><p></p><p><img src="http://i19.photobucket.com/albums/b162/thebrowndog/Group1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>zero at 100yds:</p><p></p><p><img src="http://i19.photobucket.com/albums/b162/thebrowndog/Group3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>move to 200yds, dial anticipated comeup, hit high right:</p><p></p><p><img src="http://i19.photobucket.com/albums/b162/thebrowndog/Group4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>zero at 200yds:</p><p></p><p><img src="http://i19.photobucket.com/albums/b162/thebrowndog/Group6.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>move to 300yds, dial anticipated comeup, hit high right:</p><p></p><p><img src="http://i19.photobucket.com/albums/b162/thebrowndog/Group7.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>zero at 300yds (well, one click right to be applied!)</p><p></p><p><img src="http://i19.photobucket.com/albums/b162/thebrowndog/Group9.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>Groups were fine, Avg 0.6 MOA at 100yds</p><p> Avg 0.4MOA at 200yds</p><p> Avg 0.3MOA at 300yds</p><p> </p><p>Whats going on??! I don't trust these new comeups!</p><p></p><p>[All groups fired on similar surfaces, Bipod on grass, rear sticks on cloth/gravel. Scope NOT canted!</p><p></p><p>Should also point out that since the rifle was 'A1' it has been threaded for a suppressor (with a few fine scratches being left on the lands /ubbthreads/images/graemlins/mad.gif) and it has also been reglued to its chassis.....despite this the group sizes seem OK, just not where I want them!! ]</p></blockquote><p></p>
[QUOTE="Brown Dog, post: 77870, member: 1622"] Grateful for any ideas/ advice as to what's causing the MPI shifts I observed today: I zero at one distance. Move to a new distance; dial my anticipated come-up; and hit high & right. Happened repetitively today. Happened to me on 2 previous occasions. Never figured out what it was that time either! The resulting comeups are a nonsense; 308 165BT @ 2720fps I would expect (0.1mil clicks): 100yds.........200yds..........300yds 0.................4.9clicks......13.9clicks What today gave was: 100yds.........200yds........300yds 0.................2 clicks......8 clicks opening group at 100yds: [img]http://i19.photobucket.com/albums/b162/thebrowndog/Group1.jpg[/img] zero at 100yds: [img]http://i19.photobucket.com/albums/b162/thebrowndog/Group3.jpg[/img] move to 200yds, dial anticipated comeup, hit high right: [img]http://i19.photobucket.com/albums/b162/thebrowndog/Group4.jpg[/img] zero at 200yds: [img]http://i19.photobucket.com/albums/b162/thebrowndog/Group6.jpg[/img] move to 300yds, dial anticipated comeup, hit high right: [img]http://i19.photobucket.com/albums/b162/thebrowndog/Group7.jpg[/img] zero at 300yds (well, one click right to be applied!) [img]http://i19.photobucket.com/albums/b162/thebrowndog/Group9.jpg[/img] Groups were fine, Avg 0.6 MOA at 100yds Avg 0.4MOA at 200yds Avg 0.3MOA at 300yds Whats going on??! I don’t trust these new comeups! [All groups fired on similar surfaces, Bipod on grass, rear sticks on cloth/gravel. Scope NOT canted! Should also point out that since the rifle was 'A1' it has been threaded for a suppressor (with a few fine scratches being left on the lands [img]/ubbthreads/images/graemlins/mad.gif[/img]) and it has also been reglued to its chassis.....despite this the group sizes seem OK, just not where I want them!! ] [/QUOTE]
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MPI shifts.....I have a problem!!
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