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50mm objective vs 40mm

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 17:34
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  By browsing this site for the last few weeks I have learned alot and would like to say that you guys really know your optics and have kept me from making some trial and error mistakes , so to that I say THANK YOU !  
  I am sold on the leupold VX3 4.5 - 14 , so that takes care of that part of it . So now I must decide between a 50 mm objective and the 40 mm . To get into serious target shooting at close --10 yard and long --100+ yard range I will need some sort of adjustable parallax . As I can reach the side focus knob of the 50 mm much better than the A.O. ring of the 40mm  but I have never used a 50mm before , so my question is there an advantage to 50mm? price is not an issue but the highest qualty shooting advantage is .I will be laying behind this scope in practice,practice,practice for hours and will adjust many times so your recommendations and advice would be of great help .       pc can
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 20:18
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You didn't say what kind of target shooting. It makes a difference. But let's start with objective diameter. In general most cases the extra diameter would mainly be useful for better light gathering. Since most target shooting is in broad daylight that extra light gathering is of little use. The downside of going with a 50mm objective is that it will force you to mount the scope fairly high and that can effect cheek weld. Cheek weld effects consistency.

AO vs SF: If you're doing bench rest you'll find AO is all that you're likely to need. You just don't do that much adjusting. On the other hand SF might be better for silhouette.


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 20:40
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+1 on sholling
The side adjust is nice for shooting at small critters at varying ranges. But the front AO is fine for target.
The Leo is a fine choice BTW.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 23:30
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Originally posted by pc can pc can wrote:

I am sold on the leupold VX3 4.5 - 14 , so that takes care of that part of it . So now I must decide between a 50 mm objective and the 40 mm . To get into serious target shooting at close --10 yard and long --100+ yard range I will need some sort of adjustable parallax .     pc can


pc can you mentioned 10yds. You might want to check if the 4.5-14 that you are looking at with focus down that far. I am not sure about the VX3's but in the past the only scopes that Leo made that focused down that far were the EFR's. I know that the VXIII 4.5-14x40AO only went down to 25yds and the SF models were 75yds.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 23:32
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And BTW I have a Leo 3-9x33EFR and it works very well for the ranges you talk about. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/16/2009 at 02:21
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If it turns out that the Leupy won't focus close enough then the Bushnell 4200 4-16x40 SF might be a good candidate. Its specs call out 25yds to infinity. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/16/2009 at 19:50
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For target shooting, make sure the scope has enough of internal adjustment for your needs.  Usually, a 30mm tube provides more internal adjustment than a 1" tube does. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/16/2009 at 22:44
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FYI what I said about the Leo VXIII's applies to the new VX3's. The 4.5-14x40AO is 25yds and all the others are 75yds for minimum focus distance. And this is straight out of the 2009 Leo catalog. The Leo VXII 3-9x33EFR is a good scope for the ranges you are talking about. For me the only draw back is the adjustments are coin slots and not knobs.


Edited by Sparky - June/16/2009 at 22:47
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/17/2009 at 10:33
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At 100yds I wouldn't worry too much about running out of elevation adjustment. Pretty much anything can handle 13-16" of adjustment. Most match ammo is moving pretty slow but even so I doubt you'll see any more drop than that at 100yds. About about 3" 50yds and 6-7" at 75yds.

What I would worry about is the style of elevation knobs. For varying ranges avoid coin slots like the plague. I'd check with Leupold and see if they can make you a custom elevation knob that matches your ballistics. And before that you'll have to find out what round your particular rifle likes. Rimfire target rifles are funny. Two identical rifles produced the same day might get best accuracy with completely different rounds.

Anyway if Leupold can't supply you with a target knob then I'd be looking for something with target turrets even if I had to step down to something a little less exotic.




Edited by sholling - June/17/2009 at 10:38
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/17/2009 at 11:57
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When I am target shooting I am generally shooting at a specific distance for awhile. So I am not constantly changing my elevation. Plus I know what setting to use for each distance. So the coin slots are not that bad. But they are not as easy to deal with as target knobs. And if that is a must have Leo can install target knobs on both E/W for about $100. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/17/2009 at 16:10
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Originally posted by Sparky Sparky wrote:

When I am target shooting I am generally shooting at a specific distance for awhile. So I am not constantly changing my elevation. Plus I know what setting to use for each distance. So the coin slots are not that bad. But they are not as easy to deal with as target knobs. And if that is a must have Leo can install target knobs on both E/W for about $100. 
I think what all of us are struggling with is we don't know how "serious" the target shooting the OP has planned really is, or what style of shooting. Serious as in weekly banging away at the range? Serious with friends - as in loser buys lunch? Serious as in competing in matches? Bench rest or silhouette?

I shoot "serious with friends" bench rest and a Weaver V24 is perfect for 50m, and a T22 or T36 is perfect for 100m. That's all the optical quality necessary for "serious with friends" in broad daylight at those ranges. Getting serious with matches might justify an upgrade to a Sightron SIIB. If I were shooting silhouette I'd want a 4-16x40ish scope with target knobs and side focus. It's just hard to help without more information.


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