Rifle Scopes Headed to range on Sat to tighen up my Zero

[adam1122]

Me and some buddies are headed out to ASC in Houston on Saturday to reconfirm my Zero at 50/100 and probably 200. I will be shooting a couple different types of ammo to see what kind of POI/POA differential is.

Hopefully it wont be 110 by 10AM in the AM. ANy hide members are welcome to come out. I'll take all the help and experience I can get because I have about an hour and a half to get it done which may not be all that realistic. The rifle is already shooting sub-moa groups they just are about 1.5MOA low and to the left...so I gotta go up. Once I get them shooting in the X ring I'll be all set bc my ballistic calc works perfect with my gear.

I read a really interesting post by someone who zeroed his DPMS .308 at 40 yards and from 40-250 he had to make no adjustments to hit a 6" plate....when I get more time I will develop a dope card with that system...seems very useful for snap shots.

With a USO SN-3 scope...is this easier to do by using the hex wrench or by using the EREK turret? Mike at CS Tactical says you could use either but he used the hex wrench in the video we have all seen. Thoughts are appreciated.

 

[desertrat1979]

Re: Headed to range on Sat to tighen up my Zero

I am not sure what kind of development or program you have in mind for establishing a zero, or getting the info for a dope card. I am a little fuzzy on what is going on.

The idea of using various types of ammo can be counter productive if your goal is to zero the rifle at the same time. What most folks do is get the rifle zero'd with ammo that has been proven to be accurate, THEN go on to try various loads. One thing you need to realize is 100yd performance, or even 200yds, really doesnt show you how good the ammo is, or how it will shoot. Once you take it to 500+ yds, then you get to see if that particular bullet is any good. You would need a lot of rounds of each load you shoot, to accurately determine if it will work.

Which brings me to your dope card. You say that you have a Bal. Calc. that works perfect with your gear. Most ballistic calculations are done with specific information on the particular load you are using, not equipment. Bullet weight, velocity, ballistic coefficient of the bullet are just a few "load specific" factors that I have seen 99% of the calculators use. That being said, there is yet to be a calculator made that works perfect...get you close, yeah, but perfect?? No. While the calculator will put you in the ball park, you will not know what your bullet will actually do until you get out and shoot. Shoot at all ranges, in all conditions. Its a very labor intensive process, it takes a lot of bullets, a platform that is consistent, and time. Take notes on conditions for every shot at every range. This will all go into what you need to make a dope card that will work.

While it is possible to have multiple dopes on various loads, most folks settle with one as it just makes life easier.

 

[lazy21]

Re: Headed to range on Sat to tighen up my Zero

I'll see if I can

 

[BobinNC]

Re: Headed to range on Sat to tighen up my Zero

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Adamxdavis</div><div class="ubbcode-body">

With a USO SN-3 scope...is this easier to do by using the hex wrench or by using the EREK turret? Mike at CS Tactical says you could use either but he used the hex wrench in the video we have all seen. Thoughts are appreciated. </div></div>

There is only one way to properly set up your EREK knob and that's with a hex wrench EREK Knob Adjustment and that setup has nothing to do with zeroing your rifle.

Once it is done and you only have to do it once for your rifle, all other adjustments are done with the knob itself, for zeroing, and not with the wrench.

 

[adam1122]

Re: Headed to range on Sat to tighen up my Zero

Thanks guys......I've watched the video 5x and want to make sure I don't screw up my rifles sightnsettings...it's already shooting sub moa groups with many 175smk rounds through it.....I just need to bring the impact up and inch plus and over to the right about 1/2 inch.

Just trying to find the easiest way to do this or should I just stet over.....reset erek knob and establish zero stop, then shoot for groups using the erek turret and not the hex wrench. Right? Only gotta set them up once but man it's kinda a pain.

Is there any way to salvage what I have already established? This rifle is putting rounds through the same hole at 350 yards....do I have to completely start over? There has to be an easy way to adjust....either with the hex or something. Don't mean to sound ignorant but there is so much misinformation about this out there.

Thanks bros.

 

[BobinNC]

Re: Headed to range on Sat to tighen up my Zero

Adam,

If I interpreted your post right, you've apparently sighted in your rifle, WITHOUT setting your EREK knob first.

At this point you have two choices:

Continue to shoot it, without setting the EREK knob for maximum up elevation travel, in which case you've wasted the virtue (and $) that the EREK knob provides OR set your EREK knob and re-sight in your rifle.

It not a question of which is easiest, but rather a question of maximizing the utility of the tool (EREK knob) you bought and paid for, or not.

 

[adam1122]

Re: Headed to range on Sat to tighen up my Zero

Good question.....I've got 60 total MOA of travel on my erek turret in vertical adjustment. Should I just start over so I can get all 90MOA that I should be getting. Remember, I am just shooting a .308 no further than 1000....1100 if I want to screw around.

What do you think? Worth the time?

 

[netranger6]

Re: Headed to range on Sat to tighen up my Zero

I don't have a USO, but I would take the time. Why not, it's only time and allows some more trigger pulling.

 

[Toddcal13]

Re: Headed to range on Sat to tighen up my Zero

Yes it is worth the time. As bob said above, why else have an erek? Also bottoming out or making your travel should not mess with your rifles accuracy, unless you f$ck something up.

It easy takes five minutes. I say do it

 

[adam1122]

Re: Headed to range on Sat to tighen up my Zero

Yall are right....better get another 20MOA of travel for my $200 bucks I spent on it. Then I will be able to dial 90MOA and send a .308 to never never land...or the moon.

 

[lazy21]

Re: Headed to range on Sat to tighen up my Zero

you might want to get in on this.

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2745222#Post2745222

 

[sobrbiker883]

Re: Headed to range on Sat to tighen up my Zero

Zero at 100. Dial .3 mil up afterwards and you can run the same as if you were zeroed at 50 (assuming a 2" sight height).

To really fine tune your zero set the playing cards you shoot at 1000m on edge.

 

[dumbbell]

Re: Headed to range on Sat to tighen up my Zero

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">To really fine tune your zero set the playing cards you shoot at 1000m on edge. </div></div>

Haha! Thanks SB. I was wondering if anybody else recognized the screen name and some of his other posts!

 

[adam1122]

Re: Headed to range on Sat to tighen up my Zero

Thanks for the help guys.

 

[Bwhntr53]

Re: Headed to range on Sat to tighen up my Zero

I am not sure what kind of development or program you have in mind for establishing a zero, or getting the info for a dope card. I am a little fuzzy on what is going on.

The idea of using various types of ammo can be counter productive if your goal is to zero the rifle at the same time. What most folks do is get the rifle zero'd with ammo that has been proven to be accurate, THEN go on to try various loads. One thing you need to realize is 100yd performance, or even 200yds, really doesnt show you how good the ammo is, or how it will shoot. Once you take it to 500+ yds, then you get to see if that particular bullet is any good. You would need a lot of rounds of each load you shoot, to accurately determine if it will work.

Which brings me to your dope card. You say that you have a Bal. Calc. that works perfect with your gear. Most ballistic calculations are done with specific information on the particular load you are using, not equipment. Bullet weight, velocity, ballistic coefficient of the bullet are just a few "load specific" factors that I have seen 99% of the calculators use. That being said, there is yet to be a calculator made that works perfect...get you close, yeah, but perfect?? No. While the calculator will put you in the ball park, you will not know what your bullet will actually do until you get out and shoot. Shoot at all ranges, in all conditions. Its a very labor intensive process, it takes a lot of bullets, a platform that is consistent, and time. Take notes on conditions for every shot at every range. This will all go into what you need to make a dope card that will work.

While it is possible to have multiple dopes on various loads, most folks settle with one as it just makes life easier.

Went to the range today. I used the Hornady ballistics calculator to start. I totally agree about getting you close. You can use them to get close on target but your rifle will let you know what it wants.

 

[Steel head]