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Ut-trout Rookie Member
Joined: Jan 19, 2012 Posts: 9
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Posted: Thu Feb 09, 2012 5:55 pm Post subject: .243 ballistics |
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You have all been very helpful thus far and things are progressing nicely in my quest for my pet load. What Im thinking now, and correct me if im way off, but id like to have both a varmint bullet and a hunting bullet shooting ballistically equal to avoid having to rezero my scope when shooting different rounds. I really want to stick with my vmax 75g for varmints and barnes tsx 85g for deer, both have very similar bc. So assuming im using same case,primer, and powder, will bullets of equal bc shoot roughly the same, or will bullets with the same weight shoot more alike? Im open to increasing the 87 g vmax if need be.
I know I should just test it out on the range, but I like to have an idea of the direction Im going before I start something. If im way off in my thinking please let me know. Thanks
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fnuser Super Member
Joined: Dec 23, 2008 Posts: 914 Location: S.W. Missouri, U.S.A.
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Posted: Thu Feb 09, 2012 6:42 pm Post subject: Re: .243 ballistics |
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You are right function is everything, I have had some fantastic ideas, that didn't work as cool in reality. I don't see anything wrong with that. But usually for any range that would matter you will probably have to do some knob twisting anyway. Especially if you are trying to land one on a 2" wide target.
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Vince Site Admin
Joined: May 25, 2005 Posts: 15723 Location: Brisbane AUSTRALIA
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Posted: Thu Feb 09, 2012 11:05 pm Post subject: Re: .243 ballistics |
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As FNUser said mate...range time is what you need to do. Only seeing where the different weight bullets print on the target will you know for certain what the difference is...guessing only works with a functioning crystal ball.
It isn't a problem to have different bullet weights and loads for the same rifle...what I do is pick which round is my standard or everyday round, zero my rifle to that round, then move the "click counter" on my turret to "0" by loosening the screw that holds it, moving it to "0", then re-tightening the screw.
When I zero the other rounds I record the number of clicks it takes to bring it onto target. Do this with each round. By returning your counter back to its start point you should, in theory, have returned the scope to your "everyday" zero...confirm this on the target because unless you have a good quality scope there may be slight differences.
You can keep a record of these settings with your ammo or on a chart on the side of your butt-stock.
Cheers, Vince
_________________ Cheers, Vince
Illegitimi non carborundum
(Never let the bastards grind you down)
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.
"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done) |
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chambered221 Super Member
Joined: Aug 17, 2007 Posts: 3455 Location: Lost for good !!!
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Posted: Thu Feb 09, 2012 11:26 pm Post subject: Re: .243 ballistics |
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Run the numbers through Point Blank !!!
This will give you an idea of how close things will be.
It's also possible that having two different zero points the trajectory might line up better.
_________________ Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!
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inthedark Super Member
Joined: Jan 31, 2011 Posts: 917 Location: Ontario
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Posted: Fri Feb 10, 2012 12:37 am Post subject: Re: .243 ballistics |
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_________________ Chimo
Ron
War is sweet to those who have no experience of it, but the experienced man trembles exceedingly at heart on its approach - Pindar 518-438 BC
Be Copy now of Men of Grosser Blood and TEACH THEM HOW TO WAR |
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Vince Site Admin
Joined: May 25, 2005 Posts: 15723 Location: Brisbane AUSTRALIA
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Posted: Fri Feb 10, 2012 2:43 am Post subject: Re: .243 ballistics |
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_________________ Cheers, Vince
Illegitimi non carborundum
(Never let the bastards grind you down)
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.
"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done) |
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Ut-trout Rookie Member
Joined: Jan 19, 2012 Posts: 9
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MacD Super Member
Joined: Apr 08, 2011 Posts: 1052 Location: Canada
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Posted: Fri Feb 10, 2012 10:34 am Post subject: Re: .243 ballistics |
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Talking about adjusting scopes back and forth, I was always told to click once past in the direction of adjustment and then back to the desired setting. I assume this centers the check pin or ball in the groove. On high end scopes the clicks are crisp but even mid-quality scopes sometimes have a bit of creep in either direction. Not sure if it makes much difference but I now have the habit and do it without even thinking.
_________________ La a'Blair s'math n Cairdean
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dhc4ever Super Member
Joined: May 26, 2011 Posts: 2944 Location: Ipswich, Queensland Australia
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Posted: Fri Feb 10, 2012 4:14 pm Post subject: Re: .243 ballistics |
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MacD wrote: |
Talking about adjusting scopes back and forth, I was always told to click once past in the direction of adjustment and then back to the desired setting. I assume this centers the check pin or ball in the groove. On high end scopes the clicks are crisp but even mid-quality scopes sometimes have a bit of creep in either direction. Not sure if it makes much difference but I now have the habit and do it without even thinking. |
MacD,
doing that takes up unavoidable freeplay in the threads of the adjustment mechanism.
I had to do similar when adjusting Pitch Change links on helicopter heads when tuning them in, works with most things with a thread.
_________________ Pete
Dont do anything you wont like explaining to the paramedics.............. |
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Vince Site Admin
Joined: May 25, 2005 Posts: 15723 Location: Brisbane AUSTRALIA
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Posted: Sat Feb 11, 2012 5:32 am Post subject: Re: .243 ballistics |
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Good advice Mac...and DHC4 of course.
Its a bit like tuning a guitar...do exactly the same thing. Thats why I always tap the scope after adjusting it...if its just a fraction off it will "drop" it into place.
Cheers, Vince
_________________ Cheers, Vince
Illegitimi non carborundum
(Never let the bastards grind you down)
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.
"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done) |
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Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
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Posted: Sat Feb 11, 2012 11:37 pm Post subject: Re: .243 ballistics |
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I have done this with a 30-06 using 110 V- max for coyotes and 165 SST for deer. As Vince described - I set the scope turret to zero for the SST load and fired the group for the V- max and determined I needed to go down 7 clicks for that load.
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
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inthedark Super Member
Joined: Jan 31, 2011 Posts: 917 Location: Ontario
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Elvis Super Member
Joined: Jul 27, 2008 Posts: 9259 Location: south island New Zealand
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Posted: Sun Feb 12, 2012 12:14 am Post subject: Re: .243 ballistics |
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range time is the best option. you never know you may just fluke it.
_________________ You shot it You pluck it !
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