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What power of magnification #16275775 07/23/21
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Esox357 Offline OP
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What power of magnification do you use to shoot load development. Does it matter, in respect to group size.

BP-B2

Re: What power of magnification [Re: Esox357] #16275804 07/23/21
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I use the power of the scope that is mounted on the rifle at the time. I don't which scopes.



I got banned on another web site for a debate that happened on this site. That's a first
Re: What power of magnification [Re: Esox357] #16275862 07/23/21
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Ken Waters did an awful lot of load development in sporting rifles and cartridges with the lowly 4X. I would say power is nothing to worry about if you design or use a target which shows good contrast, definition and repeatable sight picture with your reticle


Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.
Re: What power of magnification [Re: Esox357] #16275867 07/23/21
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"Which" scopes or "Switch" scopes grin? Although I do believe at times my scopes are "bewitched' or maybe just "haunted" because at times I see "Images".
Just "spooken" ya! grin

Last edited by CascadeJinx; 07/23/21.
Re: What power of magnification [Re: Esox357] #16275876 07/23/21
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mathman Online Content
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Originally Posted by Esox357
What power of magnification do you use to shoot load development. Does it matter, in respect to group size.


Load development for what application? Hunting rifle? Competitive benchrest?

For a hunting rifle with modest magnification it is extremely helpful to use a target that closely fits the reticle at the testing distance. On a capable rifle this will allow you to shoot well below MOA. I use targets that will show me if I'm canting as well, not just a round spot target.


"In the real world, think of the 6.5 Creedmoor as the modernized/standardized/optimized version of the 6.5x55/.260." John Barsness 2019
IC-A

Re: What power of magnification [Re: Esox357] #16275895 07/23/21
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flintlocke Online Content
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Well said Mathman. The older I get, the less I know which way is up. When I post my targets on the back stop, I go to the trouble to use a plumb line to get them perfectly plumb. It does make a measureable difference in group size. Even if your scope is not dead true plumb, it does introduce a level of uniformity from shot to shot which is almost as good as perfection.


Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.
Re: What power of magnification [Re: Esox357] #16275976 07/23/21
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6x minimum for a fixed power scope. If variable, then at max magnification.

Are you developing loads at 100 or 200 and beyond?

Re: What power of magnification [Re: Esox357] #16276011 07/23/21
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You can shoot some very small groups with a 6X scope, but match your aiming point to the power. I find a 2" black outlined square with a 1" white square center works very well for initial work at 100 yards using at least 4X. Others designs will work well, but use the smallest aiming point you can clearly see that doesn't cause eyestrain for whatever power you are using at whatever distance you are shooting.

Re: What power of magnification [Re: Esox357] #16276430 07/23/21
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Esox357 Offline OP
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Primarily 100 yards. Then will try 200 and 300 yards just for heck of it.

Logtech good suggestion. Thanks all.

Re: What power of magnification [Re: Esox357] #16276694 07/23/21
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This one will help you find a natural center for many reticles.

http://targetz.com/targetzlib/10045.pdf


"In the real world, think of the 6.5 Creedmoor as the modernized/standardized/optimized version of the 6.5x55/.260." John Barsness 2019
IC-B

Re: What power of magnification [Re: Esox357] #16277726 07/23/21
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Thanks MM.

Re: What power of magnification [Re: Esox357] #16310405 08/03/21
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For load development, I employ a couple of different methods but in all cases I use the max magnification. None of my scopes are more that 16 power. More importantly for me (hunting or competition) I try to remove as many variables as possible: Shoot on a clear day with low wind; use a shooting bench / lead sled; in my case, try to minimize heat...I put my ammo on ice. I mean its 108 degrees out in the summer.


Remember, not everyone has a happy ending, so be happy when you can
Re: What power of magnification [Re: Esox357] #16310649 08/04/21
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Magnification doesn't add much when comparing loads. My prewar SG '06 would shoot tighter groups at 20x, but at 2.5x can still see same difference between loads it likes vs those it don't.

Re: What power of magnification [Re: Esox357] #16315235 08/05/21
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I buy a rifle, decide what scope I want on the rifle for it’s intended use, and zero and work up loads using that scope. Just how I do it.


If we live long enough, we all have regrets. But the ones that nag at us the most are the ones in which we know we had a choice.

Doug
Re: What power of magnification [Re: Esox357] #16315255 08/05/21
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I use the highest power the scope has when sighting in. That could be 4,5,7,8,10,14,20

Re: What power of magnification [Re: Esox357] #16315258 08/05/21
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Max magnification.


"Allways speak the truth and you will never have to remember what you said before..." Sam Houston
Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"

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Re: What power of magnification [Re: chlinstructor] #16315680 08/05/21
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hanco Online Content
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Originally Posted by chlinstructor
Max magnification.


Me too

Re: What power of magnification [Re: Esox357] #16315828 08/05/21
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The higher the magnification the lower the margin of error, or to put it another way the better you can resolve aiming errors.

That was pretty common knowledge when I was a kid. One of the old gun writers, Jack O'Connor perhaps or maybe he was quoting somebody else, wrote an article listing the potential error as you went from open sights to peep sights to low power scopes to higher power scopes. Like 1/2" for open sights, 1/4" for peep sights, then 1/8" for 4x and so on. Those are just for illustration, I completely forget the actual numbers but the progressive reduction in aiming error is what's important.

There is a reason bench rest shooters use 36x scopes or I think some go even higher, they want to get the lowest possible margin of aiming error. Now that said, you needn't go crazy, just use a little common sense and match the scope to the rifle's capability.

Fwiw, I have a 12x M8 Leupold that's 33 years old but it's tried and true, I'll generally mount it on new rifles to work up loads at 100 yards. That's enough magnification to let a good rifle and load shoot in the .2's which is about as good as I'll ever shoot anything.


Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!
Re: What power of magnification [Re: flintlocke] #16318249 08/06/21
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Originally Posted by flintlocke
Ken Waters did an awful lot of load development in sporting rifles and cartridges with the lowly 4X. I would say power is nothing to worry about if you design or use a target which shows good contrast, definition and repeatable sight picture with your reticle


^^^ this ^^^


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Re: What power of magnification [Re: MuskegMan] #16318779 08/06/21
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Originally Posted by MuskegMan


6x minimum for a fixed power scope. If variable, then at max magnification.

Are you developing loads at 100 or 200 and beyond?


I beg to differ. The highest magnification used in these load development groups is 5X. The 9.3x62 is a Leupold 4X Compact which is actually about 3.3X. The first group with the Whelen is a Leupold 2.5x Alaskan. It's all about making the target suitable for the reticle, as folks smarter and better shots than me have already mentioned.
And I have to caveat I am talking about hunting rifles. Bench Rest, or maybe even PRS would need something higher, I suppose.

Cheers,
Rex

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Last edited by TRexF16; 08/07/21.
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