# 20 Most Recent Hammers Air Gun Rifle Scope 3-7x20 With Rings Questions & Answers

1. Step 1 Take a rifle with a properly installed BDC bullet drop compensating reticle to a rifle range. Using ear protection zero the scope reticle so that the point of impact corresponds to the center of the cross hairs at the distance you have selected - typically 100 or 200 yds.
2. Step 2 Determine the trajectory of the specific cartridge you have selected. There are several ways to do this. Ammo manufacturers publish trajectory and wind drift information. There are web based ballistic calculators like http://www.biggameinfo.com/BalCalc.aspx which will tell you how much your bullet drops at known distances.
3. Step 3 Scope manufacturers like Leupold can be a valuable source of information about their reticle: "Leupold® Ballistic Aiming System: Boone and Crockett Club® Big Game Reticle aiming system provides a series of additional aiming points to improve your ability to shoot accurately at longer ranges. Nikon also provides good information suggesting the marks on their reticle be used for zero at 100yds followed by circles below representing 200, 300, 400 and 500 yds if the cartridge travels around 2800 ft per sec. Nikon suggests the center cross hair be zeroed at 200 yds for magnum calibers traveling around 3000 ft per sec. We understant that each variation of different bullet weight and powder charge changes trajectory and a scope manufacturer can not build a different reticle for each different cartridge made so practice on the range to determine how well the marks relate to the actual impact of where your bullet strikes at a know distance is important. The one thing that people using BDC scopes typically have problems with is that a BDC scope has the reticle in the second focal plane of the scope. If the reticle was in the first focal plane of the scope the reticle would look smaller on low powers like 3x and grow proportionately larger as the power increased to say 9x top power. The problem is that while the marks on the BDC reticle correspond accurately to the bullet drop at the know distances 200, 300yds etc. What happens when you lower the power from the scopes maximum power to any other lower power is the reticle stays the same size and the field of view within the scope increases which means that the distance between these marks on the BDC reticle no longer corresponds to the point where the bullet will strike. In short BDC reticles only work at the maximum power of the scope or at a set specific power. At all other powers these BDC reticles do not accurately represent where the bullet will strike.
4. Step 4 The center X always remains the same. If you zero at 100 yards and you know that your bullet drops 8 inches at 300 yards you could forget about the BDC marks and hold the center X 8 inches high - that works at any power 3x or 9x and should be used at lower powers. If you zero the center crosshair at 100yds and have the BDC scope at the maximum power 9X then the first line or circle below the center X should be the mark you place on the center of the 200 yard target----- the bullet strike should hit the center. If by some chance you put the scope on 3x and placed that first mark below the center cross hair on that 200 yard target you would shoot over the top of the target. This is because as the power of the scope decreases the field of view increases the angle increase and gets wider. You can experiment with known power settings and see at a specific power say 3x what that first circle down corresponds to and make notes because at any set power what the marks correspond to will be repeatable.
I got this from a website, hope it helps.

Hammers Air Gun... | Answered on May 04, 2010

I'm not familiar with this scope, but most switches have round, tightening fasteners that can be retightened, if you can get to them, which requires disassembly. Scopes aren't usually made to be serviced, so that can be trickier than it seems, but with a good set of screwdrivers, you may be able to do this. Certain parts of the scope, however, may be machine pressed, and not allowing easy disassembly. If you can get to the switch fastener, you can probably tighten it, unless it was rivited, which I haven't seen.
If you have a gun club in you area, one of the fellows there might know how to fix it, so you might check out that avenue.
Good luck, and hope this helps.

Hammers Optics | Answered on Mar 29, 2011

Should be closest to your eye. Since the magnifier is the part that needs a specific eye relief, set it up first, then attach your red dot to align.

Hammers Optics | Answered on May 31, 2010

Henry, you need to have the name, make and model of your scope, make contact with the manufacture and, purchase a replacement part

Hammers Optics | Answered on Dec 27, 2009

it would cost more to fix a scope than to buy a new one in most cases.

it is not something you can do yourself as the scope has to be regassed and sealed.
Buy a new one

Hammers Optics | Answered on Nov 23, 2009

You have not stated the make of this telescope, but from your description, it appears you have an astronomical telescope (for star-gazing). These scopes generally omit the correction lens in the optical path that inverts the image for terrestrial use. This is because light-gathering power is more important than orientation - after all, there is no 'up or down' in space.

It may be possible to obtain an additional correction lens - check with the manufacturer or seller. If this was not pointed out when you made the purchase, you may be entitled to a refund. Otherwise, just enjoy the Heavens.

Optics | Answered on Jul 20, 2020

Hello, Tanvi -

1. Your question landed in the Fixya category for optics. "Optics" has to do with sight. I doubt that is the correct category for the question.

2. Please explain what "weavers" you are asking about and where (what country.) Are you referring the issue of suicides in the cloth weaving industry in India?

Note: Fixya.com receives questions from people worldwide. Those of us who volunteer to answer on Fixya are not mind readers and cannot guess what is meant by a question without more details.

3. You can add more information regarding your question by choosing Comment and typing added details.

Best wishes.

Optics | Answered on Jun 11, 2020

Check out Crosman site they have many parts an lots of parts fit older an new guns.

Optics | Answered on May 17, 2020

It may be the year 1967. Because I find greener gun number 79259 was made in 1967.

Optics | Answered on May 15, 2020

Trying to figure out how old my Whirlpool washer is Locate your machine's nameplate, which contains both the model and serial numbers. On top-loading Whirlpool washing machines, open the lid and look for the tag at the top rear of the tub. On front-loading washers, the tag is usually inside the door or near the bottom of the left or right side of the cabinet. If the tag is not in one of those places, pull the machine away from the wall and check the rear. Record the serial number with a pencil and paper or take a photograph. Be sure to record the serial number, not the model number. Decode the serial number at an online source like Appliance Cafe or Appliance 411 (links in Resources). Whirlpool serial numbers include a code in the second character for the year the product was built. Before 1990, the character was a number; from 1990 to 2010 the character was a letter. The number sequence started over in 2011.

Optics | Answered on May 13, 2020

https://www.youtube.com/watch?v=s90HADv-mJk

https://www.ebay.com/itm/NEW-BATTERY-CAP-COVER-SCREW-FOR-BUSHNELL-TOUR-V3-OR-V3-SLOPE-GOLF-RANGEFINDER-/264409429458

Optics | Answered on Mar 13, 2020

##### Not finding what you are looking for?

3 questions posted

## Ask a Question

Usually answered in minutes!

Level 3 Expert

18397 Answers

Level 3 Expert

85239 Answers

Level 3 Expert

68537 Answers

Loading...