Help Center

Using the Firearm

Overview

Read detailed instructions about loading, unloading, and other operation of your Centerfire Level Action Rifle.

NOTE: If your rifle is chambered for 444 Marlin, 45/70 Gov’t. or 450 Marlin, please note the following warning and dimensions.

  • WARNING: The cartridges shown below, actual size, indicate Industry Standard 444 Marlin, 45/70 Gov’t and 450 Marlin dimensions. Use of ammunition, (see following note), that does not comply with these dimensions could cause personal injury and damage to the rifle.

NOTE: Hornady Evolution Ammunition, (with red, flexible bullet tip, 2.60" max. length), may also be used. Hard pointed bullets should not be used.

centerfire336_00_hornady.png

Before You Use This Firearm

It is very important that you read and understand this manual before using your firearm. Warnings should be read and heeded carefully. Also follow The Ten Commandments of Firearm Safety.

  • WARNING: Marlin firearms are designed and manufactured to handle standard factory-loaded ammunition which conforms to SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute Inc.) standards with dependability and safety. Due to the many bullet and load options available, the element of judgement involved, the skill required, and the fact that serious injuries have resulted from dangerous handloads, Marlin does not make any recommendations with regard to handloaded ammunition.
  • WARNING: It is a violation of federal law to alter or deface the serial number of any firearm.

Use of the Offset Hammer Spur

  • WARNING: Only use the offset hammer spur on the gun with which it was packed. It will not fasten securely on narrower (1⁄4") Marlin or Glenfield hammers, or other hammers, and could cause a dangerous situation.

Because of its solid top, side ejecting receiver, your rifle is ideally suited for use with a scope. The receiver is drilled and tapped for scope mounting. However, once mounted, most scope and mount combinations do not allow sufficient clearance for your thumb between the eyepiece and hammer for safe operation. In order to operate the hammer safely, we recommend that you use the offset hammer spur packed with your rifle, when using a scope. A 1⁄16" hexagonal wrench for attaching the spur is also included.  

For right hand use, position the offset hammer spur so that it protrudes from the right side of the hammer, slide the offset hammer spur as far forward on the hammer as it will go, and tighten the set screw. For left hand use, mount the offset hammer spur so that it protrudes from the left side of the hammer, and tighten set screw. Be sure the set screw tightens into the small notch on either the right or left side of the hammer, and check regularly to be sure that it is tight.

  • WARNING: Do not use the rifle with a scope unless the offset hammer spur is securely attached in the proper position. Make periodic checks to be sure the set screw securing the offset hammer spur to the hammer is tight.

Safety Features

Your rifle has a two-piece firing pin and trigger block, both of which prevent firing until the lever is completely closed. It is also equipped with two manual safety devices, a hammer block safety and a half cock safety notch, which, when used properly, provide an added degree of safety.

  • WARNING: Before loading your rifle, become familiar with the operation of the hammer block safety and the hammer positions (FULL FORWARD, HALF COCK and FULL COCK), by practicing with the rifle unloaded.
  • WARNING: Never disassemble the safety. It has been correctly designed, fitted and tested and is not reversible. Any mechanical device can fail, however, so never rely on the safety to justify careless handling. Never use a firearm with a safety that does not function properly.
  1. How to Operate the Hammer Block Safety
    The hammer block safety mechanism is a round button located at the rear of the receiver. To put your rifle on SAFE, first move the hammer to the Half Cock position (See D and #3 under “Safety Features”).
    NOTE: You can only move the safety button if the hammer is in the Half Cock or Full Cock position. It will not move if the hammer is in the Full Forward position, or if the hammer is resting on the safety in the SAFE position (slightly forward of Half Cock).
    Push the safety button from left to right as far as it will go (See A). The safety is now on SAFE and the word SAFE will appear around the right side of the button. The hammer should now be in the Half Cock position and the safety on SAFE. This is the safest way to carry your rifle when it is loaded. At all other times the action should be open.
    centerfire336_01_picture_A_B.png
    To move the safety button to the FIRE position, push it from right to left as far as it will go (See B). A red ring will appear around the left side of the button as a warning that it is in the FIRE position. If the hammer is pulled all the way back at this point, the rifle will be cocked and ready to fire.
  2. Full Cock and Half Cock Hammer Positions
    Exposed hammer lever actions have, for over a century, relied on manipulation of the hammer for both manual cocking of the rifle as well as the traditional Half Cock safety position. Your rifle has these traditional hammer positions as well as the added benefit of a hammer block safety button. Use the following hammer positions in conjunction with the hammer block safety for the safest possible operation.
    1. The Full Cock position of the hammer is when it is at its furthest point from the firing pin (See C). If the trigger is pulled when the hammer is in this position, and the safety button is in the FIRE position, the gun will fire.
      NOTE: If the trigger is pulled when the hammer is in the Full Cock position, and the rifle is on SAFE, the hammer will fall, but will be stopped before it strikes the firing pin.
      centerfire336_02_picture_C.png
    2. The Half Cock position of the hammer is between the Full Cock position and the full forward position. (See D).
      centerfire336_03_picture_D.png
  3. To Move the Hammer to the Half Cock Position

    First put the hammer block safety button on SAFE. The hammer may be moved from Full Cock to the Half Cock position by firmly holding the hammer in the Full Cock position with your thumb. Keep your thumb on the hammer as you pull the trigger. As soon as you feel the hammer exerting forward pressure on your thumb, remove your finger from the trigger and ease the hammer slowly forward to the Half Cock position (See E & F). The hammer is now in the Half Cock “SAFE” position.
    centerfire336_04_picture_E.pngcenterfire336_06_picture_F.png

    To resume the Full Cock position, simply pull the hammer all the way to the rear (See C).
  • WARNING: Any mechanical device can fail, so never rely on the Half Cock position or the hammer block safety to justify careless handling.
  • WARNING: Never allow the hammer to rest on the firing pin (hammer in full forward position). If the rifle is loaded and the hammer is inadvertently struck in the full forward position, the rifle will fire.
  • WARNING: Should the hammer inadvertently be placed in the Full Forward position, open the bolt, put the hammer block safety on SAFE, and close the bolt. The hammer is now in the Full Cock position. Follow instructions in #3 under “Safety Features” to move the hammer to the Half Cock position.
  • WARNING: Become thoroughly familiar with the hammer positions before loading the rifle with ammunition. Failure to follow the instructions in #3 under “Safety Features” may result in “false half cock”, a condition that may allow the hammer to fall and fire the rifle if the hammer block safety button is in the FIRE position, and the trigger is pulled.

How to Load

  • WARNING: Before loading or firing, always check the bore and chamber to be sure they are free of grease, oil, or any other obstruction. With the action open, and the hammer block safety on SAFE, look through the barrel to see if there is an obstruction. If there is, it must be removed before firing. Otherwise, personal injury or damage could result.

Loading the Magazine

Be sure the bolt is closed (lever closed), the hammer block safety button is on SAFE (See A), the hammer is in the Half Cock position (See D), and the rifle is pointed in a safe direction. Insert the cartridges, bullet end first, into the loading port. As the cartridge enters the loading port, push it forward into the magazine tube (See G) Be sure that the last cartridge is completely inside the loading port before preparing to fire, or a jammed action may result (See H).

centerfire336_07_picture_G.png

centerfire336_08_picture_H.png

Preparing to Fire

With the rifle pointed in a safe direction, completely open and close the lever one time. When the hammer block safety button is moved to the FIRE position, your rifle is loaded, cocked, and ready to fire.

  • WARNING: If you do not want to fire at this point, return the hammer block safety button to the SAFE position, and the hammer to the Half Cock position (See E & F).

Loading a Single Cartridge

With the hammer block safety button on SAFE, the rifle empty, and the lever open (bolt open), place a single cartridge with the bullet forward, in the ejection port, onto the carrier (See I).

centerfire336_09_picture_I.png

Return the lever to the closed position (bolt closed). The cartridge will be fed directly into the chamber and the rifle will be cocked and ready to fire, when the hammer block safety button is moved to the FIRE position.

  • WARNING: Never attempt to load your rifle with ammunition that does not meet the cartridge designation stamped on the barrel. Use only ammunition suitable for a tubular magazine rifle. We recommend clean, dry, factory-loaded ammunition which conforms to industry standards.
  • WARNING Regarding Ammunition: Some pointed and full metal jacket round nose bullets which are on the market can chainfire other cartridges in a tubular magazine during recoil causing severe injury and damage. Hornady Lever Revolution ammunition has a soft pointed plastic tip, and can be used safely in your rifle. If you are uncertain about the safety of using a particular cartridge in your Marlin, contact the ammunition or bullet manufacturer.

How to Fire

With the hammer in the Full Cock position, push the hammer block safety button to the FIRE position and, with the gun pointed at the target, squeeze the trigger. The gun will fire. Work the lever fully open and closed for each repeat shot. If you do not fire all the cartridges in the magazine, be sure to put the hammer in the Half Cock position and the hammer block safety button on SAFE until you are ready to shoot again.

  • WARNING: Remember, until a visual check has been made, you must assume that a live round remains in the chamber. Whenever the action is closed, assume a live round is in the chamber.

What to do if Rifle Fails to Fire

Misfire

If you have squeezed the trigger and the hammer falls but the cartridge does not fire, remain in shooting position, pointing the gun in a safe direction. Count to 10, then open the action.

Underpowered Shot

A “squib”, or underpowered shot can normally be detected by the unusually low report it makes.

  • WARNING: Because the bullet may actually still be in the barrel, you must unload completely and, with the action open, use a cleaning rod to see if there is an obstruction. If there is, it should be removed by a qualified gunsmith. Otherwise, personal injury or damage could result.

How to Unload

Put the hammer in the Half Cock position and the hammer block safety button on SAFE.

Keeping your fingers away from the trigger, and with the gun pointed in a safe direction, manually eject all cartridges by opening and closing the lever, until you are sure the chamber and magazine are empty (See J). The lever must be completely closed and then fully opened to insure proper feeding and ejecting of all cartridges. Then, with the lever in the open position (bolt to the rear), inspect the chamber, carrier and magazine carefully to be sure there are no cartridges left in the gun.

centerfire336_10_picture_J.png

  • WARNING: During the unloading process, be sure the hammer block safety button is on SAFE, because each time the lever is completely closed (bolt closed), your rifle is cocked and ready to fire. Keep your fingers away from the trigger and be sure the gun is pointed in a safe direction during unloading.

Sighting

Your rifle has been sighted-in and testfired at the factory. However, due to individual sighting characteristics, sighting should be range verified.

Rear Sight Adjustment Rule

To make corrections, always remember to move the rear sight in the direction in which you wish to move the center of the group. That is, if you are shooting low, raise the rear sight. If you are shooting to the right, move the rear sight to the left.

For Models Equipped With Elevator Adjustable Open Rear Sights

Horizontal Correction (Windage)

Windage adjustments to the rear sight can be made by gently tapping the dovetail portion of the rear sight in the desired direction.

To move the point of impact to the left, move the rear sight base to the left. To move the point of impact to the right, move the rear sight base to the right.

centerfire336_11_screw_adjustable_sight.png

Vertical Correction (Elevation)

To raise the point of impact, raise the rear sight. To lower the point of impact, lower the rear sight. The sight can be raised and lowered by moving the stepped elevator forward and back with your thumb.

For Models Equipped With Screw-Adjustable Rear Sights

Horizontal Correction (Windage)

To move the point of impact to the left or right, loosen the leaf binding screw until you can move the leaf manually. Move the leaf in the appropriate direction, retighten the screw and fire again. Continue this process until your shots are horizontally zeroed-in.

Vertical Correction (Elevation)

To raise the rear sight (if you are shooting low) turn the elevation adjustment screw clockwise. To lower the rear sight (if you are shooting high) turn the elevation adjustment screw counterclockwise. Continue adjusting and firing until your shots are vertically zeroed-in.

Scope Mounting

Your rifle is drilled and tapped for scope mounts. They are made by Tasco, Weaver and others, and are available through your local gun dealer. You may also order directly from Marlin Gun Service. Call 1-800-544-8892 for more information.

  • WARNING: Improper mounting or use of a scope may result in facial injury. Always allow sufficient space between the scope and eye to avoid contact from recoil. Be sure to follow the scope manufacturer’s instructions for correct mounting and use. Periodically check the scope to ensure it has not moved during use.

How to Clean Your Rifle

  • WARNING: Never attempt to wipe down or clean a loaded firearm.

Caution: Before using any solvent or other gun cleaning product, read the label carefully to be sure it will not damage either the finish, or any parts of this firearm.

NOTE for stainless steel models: Although stainless steel is corrosion-resistant, it can rust. If the rifle gets wet, dirty, or is subject to excessive handling, wipe down metal parts with oil or rust-inhibitor.

Minor scratches can be “buffed out” of stainless steel with a “Scotch-BriteTM Very Fine” pad, available in hardware and automotive supply stores.

  1. Put the hammer block safety button on SAFE and remove all cartridges from the action, chamber and magazine before you begin cleaning or inspecting your rifle.
  2. To clean the bore from the breech end (recommended), open the lever half way, remove the lever screw (See K) and then the lever. Then remove the breech bolt from the receiver (See L). (This will cause the ejector to be loose inside the receiver — be careful not to lose it.) Next, remove the ejector from the slot in the left side of the receiver (See M).
    centerfire336_12_picture_K.png
    centerfire336_13_picture_L.png
    centerfire336_14_picture_M.png
  3. WARNING: If you move the hammer block safety to the FIRE position after the bolt has been removed, do not pull the trigger, letting the hammer snap forward, because the hammer blow will damage the safety mechanism.

    The bore can now be cleaned, using the proper caliber cleaning rod, cleaning patches and powder solvent. Clean and oil the breech bolt before replacing. The barrel and bore should also be lightly oiled.

  4. The action may be cleaned and oiled while the gun is disassembled as described above.

  5. To reassemble, simply reverse the above steps. Make sure the ejector is positioned properly prior to alignment and insertion of the breech bolt. See N for the relationship of the bolt and ejector for correct alignment. Push the breech bolt into the receiver until within approximately 1" of the fully closed position (See O). The lever may now be inserted as shown in P.
    centerfire336_15_picture_N.png
    centerfire336_16_picture_O.png
    centerfire336_17_picture_P.png
    Use a very thin coat of light oil during below freezing conditions. Condensation droplets will form soon after the rifle is brought into a warm room, or the rifle may become wet during inclement weather. In any case, all moisture should be removed. Exterior metal finishes may be wiped down with a slightly oiled cloth. For long term storage, lightly oil the bore, barrel and action with gun oil. Your rifle should be completely unloaded and stored in a dry, ventilated area. Do not store it in a carrying case.

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