Trouble zeroing new scope and rifle

How about a picture of how your scope is mounted so we can give you good advice? Don't know if you have a base and rings or using rimfire rings.

Shim it. I had the opposite problem with mine and shimmed the front mount Shim material can be bought at most hardware stores or you can make shim material from a beer can. I put the shim between the barrel and the picatinny rail on which the scope is mounted. For 2inches it doesn't take much. I don't know if shimming the scope between the scope and the mount would distort the scope or not.

Shoot it at 100 yards and see what happens. Scopes are mounted above bore, so the barrel is about 1.5" below the sight plane at the muzzle. So until the projectile reaches a particular distance, it will be impacting low. 25 yards is very likely too close for the projectile to fall into the sight plane. The higher velocity, the more distance required before cross over will occur.

GS

I had a similar issue yrs ago.

Verified my rings and bases as good and swapped in a different scope.
Gun zeroed easily.

Suspect scope was found defective by manufacturer, fixed and worked great ever after.

Have seen mismachined bases and rings. Also have seen properly machined but mismatched sets of both.

One should always check things out before placing a scope in them!

BTW, have seen some bad crowns, bent barrels, funky chambers and barrel to receiver fitment.
There's a lot of things that could cause a problem with zeroing in a rig.... having a known good scope laying around may help in problem solving.

Should be able to get it zeroed at 25. Two inches low with vert adj max'd is still too low.

If the rings are suspect don't put a known good scope in them.

Take the suspect scope and put on known good gun/ring combo.

Saw a Ruger set of rings crinkle a scope tube, saw one set of Burris Zee's do the same (I saw the aftermath, and checked the rings- was not the one who mounted them). The rings were not machined correctly. Both guys got new rings for free from the manufacturers, but they ate the scope loss. Really like the Burris Signature Zee rings. Have had good luck with reg Zee's, but with all rings I check for alignment before I add in the scope.

On reg Zee's I still knock off the ring points and reblue. They do it at the factory, but I take more off.

Don't scratch scopes either. Saw the need for offset bushings on two rifles. An Encore and an H&R. Neither would zero. Burris Signature Zees worked (IIRC offset insert kit was $16).

BTW, saw a pack of new Rem 700 Weaver bases with the holes off center on the rear.

Did see yrs ago a poor guy crush a 6.5-20X Leupold, putting together a rifle at another shop. Ruger, he had the rings in the wrong spots, were of differing height.

I heard the chink and saw the horror on his face.

Not everybody has the focus of pays attention to fine detail. Many are also deaf with the hands, "all or nothing" types.

Putting guns and bows together takes a bit of finesse.

I just recently lapped a new set of Zee rings that were the absolute worst case I've seen. Fortunately I never mount rings without first lapping, if I had, I probably would have damage the tube.

GS

Leupold med height rings.

Can't get enough elevation. I've adjusted up as far as it will go and I'm still 2 inches low at 25 yards.

Click to expand...

You shoot at 25 yards to make sure you're on the paper so you don't have to go chasing the impact area around. You're on paper.

Take it out to 100 and see what happens.
What you have is an example of 'height over bore', the scope is sitting pretty high up over the bore and you'd have to have an extreme angle to make the bullets impact at POA at a mere 25 yards.

I have never had to lap rings.

Have seen a few folks overdo the lapping on stuff of fair recoil, experience scope slip- mark up some scopes.

Burriz Signature Zee's aint perfect, but they do a decent job.

If someone is over lapping, then they have no business lapping in the first place. Lapping isn't rocket science, all it does it assure you don't have high spots, thus making sure the rings are evenly contacting the tube. Never use a power tool for this.

GS

OJ.

You don't lap the Sig Z, the plastic inserts mean there's no need.

They grip really well, leave no marks.

The bad of them are:

1. the Medium is higher than a reg Z medium.
2. the inserts project outside of the ring, so have a bit of a bulky look
3. The inserts grip well to the scope, so don't self center in the rings (have seen folks
have them off a bit).

I find the quirks tolerable.

Did go with reg Zee on my 10/22 with 2-7X. Wanted a cleaner look.

It appears in Your pic's that the objective end of the scope may be touching
the barrel. if so,, bad Ju Ju.

Good shooting

Lindy

I am but a blind squirrel.

...and, lo, he found an acorn.

Glad it worked out for you!

GS