I AM TRYING TO BORE SIGHT A REDFIELD 6 - 18 X 44 REVENGE SCOPE. BEFORE I CAN GET THE CROSSHAIRS ALIGN GOING UP AND DOWN I RUN OUT OF CLICKS ON THE ADJUSTMENT. I AM ABOUT 6 INCHES LOW WITH THE LASER ON

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You backed it off too far and the alignment screw came out of the internal guide. They are usually pretty close to accurate when they are released from the factory. Make sure your mounts are in proper alignment and tight before trying to sight it in. 1 click is normally 1 inch at 100 yards.

Redfield was purchased by Leupold in 2008, and is only able to repair and service Redfield scopes made in 2010 or later. If it was made before 2010, then it isn't covered by warranty, but Leupold does suggest contacting Iron Sight, Inc, if you want to ask about repairs and associated costs. Here's what the Redfield/Leupold website says:

When Leupold & Stevens, Inc.® purchased Redfield in April 2008, it did not acquire the capability to repair Redfield products manufactured prior to this purchase. The repair tooling and parts were purchased years ago by other repair services. Leupold & Stevens, Inc. will service its manufactured Redfield product (manufactured from 2010 forward) in accordance with its published warranty.
At this time, should a non-Leupold & Stevens, Inc. Redfield product require service, we suggest contacting Iron Sight, Inc. (918) 445-2001. This contact is provided for information purposes only, as Iron Sight Inc. is not affiliated with Leupold & Stevens Inc. They should be contacted directly for all information regarding repair, service and associated charges.

Put the gun in a vise. Look into a mirror and align the crosshairs so that you have one set of crosshairs when viewing in the mirror. The windage adjustment is maxed to the side you are trying to adjust . This will set the parallax of the crosshairs close to zero and allow adjustment in all directions.

well if the bullet hit is jumping about its all down to your scope,,,it could be that its just "lose on its mount!" or its died on you,,like the cross hair is bouncing about inside the scope so with the recoial it jumps into a new place with every shot fired there by giving you a new point of impact,,,
this can happen if the scope was wound right up or down or left or right and strain was put on the adjusters,,,you may need to buy a new scope,,,,a good "air rifle!" scope will work quite well on most full bore rifles,,,yer right i here you say!!! ok,,iv got air rifle scope's on my .303 + 7.62 + 22-250 + .357 under leaver marlin cowboy, all 3 of my .22 rim fire's and they have been on these rifles for years now,,,1000,000, of rounds fired so far, with no problems! and no drifting so far,,,
an air rifle scope is very strong you know,,,but they only cost £150,00p or less for a good one?????
ps,,,,dont buy a tesco scope there cra*y

I couldn't find the eurohunter model, but I checked out the website. Without a bore sighter, You can still get your scope to hit a paper plate at 100 yards by using a cardboard box. Then it will fine tune in just a few rounds. Only a bolt action though, you have to be able to see down the bore. Take a big box, or a rifle vise, cut some V's into the top edges, lay the rifle in there, pull out the bolt, find a target 100 yards away, put the bore of the rifle on it and don't move the rifle. Then put the crosshairs of the scope on the same target, check to make sure the rifle didn't move, then check the cross hairs again. You will be able to hit your target at 100 yrds, the ar 15 is an exception to the bolt action, you can see down the bore.

Contact Leupold, they purchased Redfield.
Here's the info from Redfield's website, hope this helps, Mark the Gunsmith:
When Leupold purchased Redfield in April, 2008, Leupold did not assume the Redfield warranty. Because many Redfield customers have contacted Leupold with regard to the former Redfield warranty, Leupold is making this information available to Redfield optics owners.
At this time, three Redfield repair facilities are available should your Redfield product require service: Parson's Scope Service(513-867-0820), ABO USA Inc (305-859-2010) and Iron Sight Inc. (918-445-2001). The contacts provided are for information purposes only, as these companies are not affiliated with Leupold & Stevens. Please contact them for all information regarding repair, service, and associated charges.
As a courtesy we are now offering 20% off the price of a new Leupold scope, up to $100, in trade for any defective Redfield scope. If you would like to take us up on that offer you may call us at 1-800-LEUPOLD.

It doesn't sound like anything's broken, it sounds like the scope has shifted in the rings, as you said "they are not straight up and down anymore", which won't effect your accuracy at short ranges, but if there's long ranges (more than 100 yards) you're going to be off some.
You can loosen the ring screws until the scope will turn, either 2 or 4 screws that hold the two halves of the ring together. There are numerous tools to help you align the crosshairs, but when I do this job I just square-up the reticle (crosshairs) by looking at the center of the reticles and let your eye follow the bottom crosshair down and make sure it is centered on the back of the bolt or receiver. If you need help doing this job, take it to your local gunsmith, he'll be able to square these up for you and boresight it.
Hope this helps, Mark the Gunsmith

Looking for instructions on the use of an Acu-trac rifle scope by Redfield. There are lines above the crosshairs and a yardage graph on the bottom of the crosshairs.

Found this info on another site a while back and saved it. Hope it helps! "the two lines across the top in your scope represents 18" which is the standard size for the deer's body from the top of his back to the bottom of his stomach. If you see a deer feeding in a field and you want to know how for he is, you turn your power up till the top of the deer and his stomach fit between the two lines at the top in your scope. You then
look at the scale at the bottom of your scope and it will tell you how far he is in yards."