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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What's going on with my .338WM trajectory?
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<blockquote data-quote="Topshot" data-source="post: 376640" data-attributes="member: 13285"><p><span style="font-family: 'Arial'"><span style="font-size: 10px">I loaded up some 250gn Hornady BTHP match projectiles and chronographed them at 2652 fps.</span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 10px">Checked my zero at 100 yards was spot on, then worked out a drop at 1000 yards of 30.75 MOA and at 605 yards of 13.75 MOA.</span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 10px">Temp 19C pressure 1000mb. </span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 10px">Rifle is a Tikka T3 Laminate with a Clearidge 2.5-12.5x42 Ultra XP5 on 20MOA rail. It is quite an accurate rifle for a light weight hunting rifle.</span></span></p><p> </p><p><span style="font-family: 'Arial'"><span style="font-size: 10px">Now at 1000 yards the group was 44cm high and at 605 yards the group was 30cm high. I have played about with the inputs into my ballistic program but can not get thing to line up like they should. I am thinking as the height error seems to be linear from 605 to 1000, that maybe my scope turret adjustments are not quite MOA?????</span></span></p><p> </p><p><span style="font-family: 'Arial'"><span style="font-size: 10px">Any ideas?</span></span></p></blockquote><p></p>
[QUOTE="Topshot, post: 376640, member: 13285"] [FONT=Arial][SIZE=2]I loaded up some 250gn Hornady BTHP match projectiles and chronographed them at 2652 fps.[/SIZE][/FONT] [FONT=Arial][SIZE=2]Checked my zero at 100 yards was spot on, then worked out a drop at 1000 yards of 30.75 MOA and at 605 yards of 13.75 MOA.[/SIZE][/FONT] [FONT=Arial][SIZE=2]Temp 19C pressure 1000mb. [/SIZE][/FONT] [FONT=Arial][SIZE=2]Rifle is a Tikka T3 Laminate with a Clearidge 2.5-12.5x42 Ultra XP5 on 20MOA rail. It is quite an accurate rifle for a light weight hunting rifle.[/SIZE][/FONT] [FONT=Arial][SIZE=2][/SIZE][/FONT] [FONT=Arial][SIZE=2]Now at 1000 yards the group was 44cm high and at 605 yards the group was 30cm high. I have played about with the inputs into my ballistic program but can not get thing to line up like they should. I am thinking as the height error seems to be linear from 605 to 1000, that maybe my scope turret adjustments are not quite MOA?????[/SIZE][/FONT] [FONT=Arial][SIZE=2][/SIZE][/FONT] [FONT=Arial][SIZE=2]Any ideas?[/SIZE][/FONT] [/QUOTE]
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What's going on with my .338WM trajectory?
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