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cant sight in s308


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About a month ago, i decided to sight in my 308, well i put a target at 300 yards and went to work, at the end, i was shooting too low and the scope was turned all the way up. this is the same at 100 yards and even 50 yards, anyone have a suggestion on why and how to fix?

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Perhaps a "ramped" sight base? I know that alot of the (quality) longer range stuff I've seen have them:

 

post-20073-12748985327046_thumb.jpg

 

Yes, it's wicked accurate. Yes, I've shot it (it is SWEEET!)

 

The reason you're shooting low is that the sight base you are using is possibly either canted to the rear of the reciever, or your scope does not allow enough elevation for a "flat" scope mount at the desired range.

 

The purpose of the ramped base (canted FORWARD) is to allow you not only to sight in at the desired range, but to allow for elevation changes that are repeatable at set ranges once properly sighted in.

 

Not bad for a chick, huh?

Edited by bohound
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Not bad at all. :)

 

OK get a gun vice and a good small level or one made for this task and once you have the rifle itself level check the base without scope. Now you know, then put the scope mount on sans scope if possible and check the rail for level. Many mounts can be shimmed to level. Now if you have this done mount the scope and once again check the level, yes Ive seen scopes cant from bad or cheap rings. Now that everything is level you should be able to start sighting in using increments I have actually had to start at 10 yards with one rifle but once its done it should be good for a very long time. One caution if you have adjusted the scope to the far end of one adjustment then you may want to bring it back towards mid-range. Nice to have tools, vice, rifle level, bore sighter, and patience.

 

Things that affect zeroing scopes include cheap rings, a mount too high above the barrel (yes it matters), canted mounts, NOT getting your eye in the same position each time you fire! Parallax can drive you insane on some scopes at short ranges. Lots of really good info on the web and youtube for this kind of thing.

 

Now you see why I like good irons.

Edited by Rhodes1968
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i have a crappy utg mount on it that looks tacky on the gun, and 1 inch rings, and a 24x scope. i feel the scope is a little much too, but it was a present from an ex gf. i would like to put a mount that goes from the rsb to rear trunion. think it would fit better and be more comfortable to look through the scope. do need to check and see if it is level. i fear that the utg was never intended to be used on a long distance gun. if i can just be able to hit mst at 300 yards, i will be happy, i can kentucky wind it, but who wants to do that. trying to post a pic, but whoevers internet im (borrowing) must be playing wow or downloading porn

Edited by BROWNEYE
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If your scope is adjusted all the way up and still shooting low, try putting a shim (folded piece of paper or anything that will fit) in between the under side of the scope and the front scope ring . This will angle your scope up raising your point of impact. If it isn't enough, I'd get a new mount.

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trying to post a pic, but whoevers internet im (borrowing) must be playing wow or downloading porn

:lolol::lolol::lolol:

 

Unsecured networks crack me up. This quote may go in my sig line Browneye... I'm seriously laughing out loud at this! Thanks!

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"If your scope is adjusted all the way up and still shooting low, try putting a shim (folded piece of paper or anything that will fit) in between the under side of the scope and the front scope ring . This will angle your scope up raising your point of impact. If it isn't enough, I'd get a new mount."

 

Wouldn't you want to raise the rear of the scope ring to raise the POI? With iron sights I always remember "move the front the opposite way you want the round to go" I don't have a lot of scope expierence but I think the same philosophy applies.

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trying to post a pic, but whoevers internet im (borrowing) must be playing wow or downloading porn

:lolol::lolol::lolol:

 

Unsecured networks crack me up. This quote may go in my sig line Browneye... I'm seriously laughing out loud at this! Thanks!

lol no prob, yeh i love how my computer just happens to make every network available in a matter of minutes.

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"If your scope is adjusted all the way up and still shooting low, try putting a shim (folded piece of paper or anything that will fit) in between the under side of the scope and the front scope ring . This will angle your scope up raising your point of impact. If it isn't enough, I'd get a new mount."

 

Wouldn't you want to raise the rear of the scope ring to raise the POI? With iron sights I always remember "move the front the opposite way you want the round to go" I don't have a lot of scope expierence but I think the same philosophy applies.

 

It made sense in my head when I wrote it.... I very well could have it backwards though.....unsure.gif

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Thats why I gave up and bought a level. If things are all on the same plane theres no big deal.

 

That might be the problem. If your scope is mounted with rings that are too tall AND perfectly parallel to your barrel, you will have zeroing problems. Your line of sight is straight, but the bullet has to arc to hit targets at a distance so you have to aim high to accommodate for the bullet drop. If you look closely, your scope should look slightly stink bugged sitting on your rifle.

It kind of sounds like you need low rise rings.

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Thats why I gave up and bought a level. If things are all on the same plane theres no big deal.

 

That might be the problem. If your scope is mounted with rings that are too tall AND perfectly parallel to your barrel, you will have zeroing problems. Your line of sight is straight, but the bullet has to arc to hit targets at a distance so you have to aim high to accommodate for the bullet drop. If you look closely, your scope should look slightly stink bugged sitting on your rifle.

It kind of sounds like you need low rise rings.

 

That would be all I ever use, depending of course on clearance of the scope. This is the same procedure I use on all scopes and rifles (even scouts)it works extremely well. I got it from Midway on youtube. If all axis are level in relation to the barrel not canted in any it makes adjustment so easy. Still glad I dont have to fool with scopes on the AKs any longer ;)

 

Hmmm stink bugged? I do not know the term but it sounds nasty lol

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Wouldn't you want to raise the rear of the scope ring to raise the POI? With iron sights I always remember "move the front the opposite way you want the round to go" I don't have a lot of scope expierence but I think the same philosophy applies.

No because when using the scope you're not trying to line up the rear of the rifle to the front sight post.

 

Raise the front of the scope mount to raise the point of impact.

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Hmmm stink bugged? I do not know the term but it sounds nasty lol

 

When anything messes with a stink bug (big black beetle), it sticks its ass in the air and lets out a foul odor. Its a car term.

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