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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Let's argue about BC's
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<blockquote data-quote="groper" data-source="post: 475399" data-attributes="member: 12550"><p>Eddy, my NXS 5.5-22x56 has +2.5% error - which means when i dial 40clicks, im really getting 41 on the target... Ive had other scopes with upto 5% error like this.</p><p></p><p>I shoot a group @ 100, dial 100clicks up, shoot another group then measure on the target group 1 center to group 2 center. I dont bother doing the same with windage because the most wind ive ever had to dial is about 20 clicks and a few percent of this is gonna be within 1 click anyway...</p><p></p><p>I use a "custom click value" in my ballistics calculator to take this error out in my trajectory calculation- which becomes (0.1mrad*1.025) clicks. For this scope.</p><p></p><p> Eddy, have you tried adjusting your velocity instead of the BC? I dont use my chrony anymore in this regard, because IT was the source of half my problems... If you have a bullet that Litz has tested, use the exact Litz G7 derived BC, make sure all other variables are correct, including your dead on zero @ 100 for that load, ignore your chrony and adjust the VELOCITY in your calc, and see how your trajectory fits then- i bet it you will hit everything at all distances out to 1 mile...</p></blockquote><p></p>
[QUOTE="groper, post: 475399, member: 12550"] Eddy, my NXS 5.5-22x56 has +2.5% error - which means when i dial 40clicks, im really getting 41 on the target... Ive had other scopes with upto 5% error like this. I shoot a group @ 100, dial 100clicks up, shoot another group then measure on the target group 1 center to group 2 center. I dont bother doing the same with windage because the most wind ive ever had to dial is about 20 clicks and a few percent of this is gonna be within 1 click anyway... I use a "custom click value" in my ballistics calculator to take this error out in my trajectory calculation- which becomes (0.1mrad*1.025) clicks. For this scope. Eddy, have you tried adjusting your velocity instead of the BC? I dont use my chrony anymore in this regard, because IT was the source of half my problems... If you have a bullet that Litz has tested, use the exact Litz G7 derived BC, make sure all other variables are correct, including your dead on zero @ 100 for that load, ignore your chrony and adjust the VELOCITY in your calc, and see how your trajectory fits then- i bet it you will hit everything at all distances out to 1 mile... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Let's argue about BC's
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