I have a Vortex PST II 5-25x50 mounted on a 0 MOA EGW rail. I typically shoot out to 600 yards so the rail is more than adequate however, I have a chance to shoot on a range that has targets set up at 1,100 and 1,300 yards. My scope has 192 remaining clicks or about 50 MOA so I have been thinking of putting a 20 MOA rail on. If I do, should I be planning on a 200 yard zero instead of 100 yards?
- Thread starter Paul1262
- Start date
With your current setup (scope + 0 elevation rail):
- How much elevation up from your 100 yd zero are you using to get to 600 yards?
- How much elevation up from your 100 yard zero will you need to make it to 1300 yards?
- How much elevation does your scope have up from 100 yd zero to the point where it physically runs out?
I run a 30 moa rail and still easily zero at 100.
Nope.
1. At 600 yards the elevation is up approximately 51 clicks or approximately 13 MOA.
2. At 1300 yards I will need approximately 191 clicks up or 50 MOA.
3. The elevation will physically top out at approximately 192 clicks or 50 MOA.
Thanks
So if you out a 20 moa mount on you get that back. Keep your 100 yd zero and you should now top out somewhere around 2k yards.
As has been advised, the 20 MOA mount will let you keep a 100 yard zero and extend your scope's elevation to well beyond your rifle's maximum range.
Why do you keep referring to your come ups in clicks? What are those clicks worth, .25 MOA or .25 IPHY?
Actually, the click value I use in my calculations is .26 for 1/4" at 100 yards.
Sounds like you got this all figured out...............LOL
I'm not quite sure how to interpret that.
So, did you mean that you did a tracking test and determined that your scopes turrets are tracking .26 moa per click value? How certain are you that .26 moa is correct?
If so, your tracking error is about 4%.
I'm assuming it's supposed to be quarter minute turrets?
Or, did you mean something else?
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I indicated 1/4" in error, I did mean quarter minute turrets. Sorry for confusion.I'm not quite sure how to interpret that.
So, did you mean that you did a tracking test and determined that your scopes turrets are tracking .26 moa per click value? How certain are you that .26 moa is correct?
If so, your tracking error is about 4%.
I'm assuming it's supposed to be quarter minute turrets?
Or, did you mean something else?
I indicated 1/4" in error, I did mean quarter minute turrets. Sorry for confusion.
Ah, got it now.
And now you see why most here prefer milliradians for any scope where frequent changes to elevation and windage are made with the turrets. There is no source of unit error since a .1 milliradian adjustment always yields .36 IPHY.
Unless you verify with a tracking test, it's difficult to know if an "MOA" scope's scope adjustment increment is .25 or .26 IPHY. And errors compound........
For a scope with a duplex or BDC reticle, that won't see use of the turrets once it's zeroed, it doesn't much matter if it adjusts in mils, MOA, or IPHY. But even then, confusion between MOA and IPHY can create problems when trying to calibrate the stadia on a BDC.
There's a link to an article on the front page of this website that should help explain this.
Click where it says "stop the debate".
www.snipershide.com
Click where it says "stop the debate".
The Hide
Sniper's Hide for the serious tactical marksman. Learn new skills with Sniper's Hide Training. Precision Rifle Marksmanship topics and discussions.
www.snipershide.com 
Paul - a 20moa (5.8 or so mil) rail will put you roughly in the middle of the mechanical sweet spot for the ranges you speak of.
308pirate - what I see from you is profane condescension towards a guy (Paul) who asked a simple question in good faith.
Here's a pic before you edited, since you like to do the attach thing more often than not, I thought I'd respond in a similar vein.
Keep the good info coming, but try to resist the urge to play johnny wannabe on a keyboard; it reduces your credibility.
Your edit was a step in the right direction.
308pirate - what I see from you is profane condescension towards a guy (Paul) who asked a simple question in good faith.
Here's a pic before you edited, since you like to do the attach thing more often than not, I thought I'd respond in a similar vein.
Keep the good info coming, but try to resist the urge to play johnny wannabe on a keyboard; it reduces your credibility.
Your edit was a step in the right direction.
Attachments
Get the fuck out of here with your lectures.
Thanks for the info.
Thanks for the information. Thought I was asking a simple question - debate ended.There's a link to an article on the front page of this website that should help explain this.
Click where it says "stop the debate".
The Hide
Sniper's Hide for the serious tactical marksman. Learn new skills with Sniper's Hide Training. Precision Rifle Marksmanship topics and discussions.
You're welcome. A 20 MOA base will square your elevation problem away.
Out of curiosity, what cartridge are you shooting out of the rifle in question?
No worries, we don't mind helping out when possible. Some of the guys here can be a little abrasive and to the point, but are usually correct.
The article I mentioned was written by Lowlight, the site owner. He put some effort into that article, with input from many of the members here. It's a good read.
Asking questions is how you get answers. As long as you have a fairly thick skin and stick around, you'll soak up plenty of knowledge.
As mentioned above, a 20 moa base will get you what you need. Most here use at least a 20 moa base. It's pretty much the standard these days. My scopes came from the factory pre-set 5.8 mils (20moa) below mechanical center. The manufacturer correctly assumes, it's probably going on a 20 moa base.
My FN SPR receiver came from the factory with a 20 moa base installed.
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This, bought one for my RPR and have a vortex PST 6-24 ffp and have zero issues with a 100yd zero
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