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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
BALLISTIC COEFFICIENTS/Twist Rates
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<blockquote data-quote="groper" data-source="post: 419659" data-attributes="member: 12550"><p>Good info bryan, id have to agree 100% with your comments on "tweaking" the BC to match known drops.</p><p></p><p>My last scope tracking was unknowingly out by 5%. So instead of dialing 8mils i was actually dialing 8.4mils. I ended up chasing my tail for ages tweaking velocities and BC`s to match the trajectory i was getting, never getting it 100% correct until i finally found the problem. Same goes for the Zero, it has to be 100% spot on and remeber to rezero it if you tweak your load in any way or shoot in different weather conditions.</p><p></p><p>Bryan, i found your ballistic testing and measured/calculated G7 BCs be of greatest help in this regard also. Using your G7 BCs i tweak my velocities now to line up my trajectories with known drops at 1000yds and it gets me **** close, certainly less than 1 click at this distance which is certainly closer than using my chronographed velocities and tweaking the BC. Obviously my chrony isnt accurate enough. lightbulb</p></blockquote><p></p>
[QUOTE="groper, post: 419659, member: 12550"] Good info bryan, id have to agree 100% with your comments on "tweaking" the BC to match known drops. My last scope tracking was unknowingly out by 5%. So instead of dialing 8mils i was actually dialing 8.4mils. I ended up chasing my tail for ages tweaking velocities and BC`s to match the trajectory i was getting, never getting it 100% correct until i finally found the problem. Same goes for the Zero, it has to be 100% spot on and remeber to rezero it if you tweak your load in any way or shoot in different weather conditions. Bryan, i found your ballistic testing and measured/calculated G7 BCs be of greatest help in this regard also. Using your G7 BCs i tweak my velocities now to line up my trajectories with known drops at 1000yds and it gets me **** close, certainly less than 1 click at this distance which is certainly closer than using my chronographed velocities and tweaking the BC. Obviously my chrony isnt accurate enough. lightbulb [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
BALLISTIC COEFFICIENTS/Twist Rates
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