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Cannon Safety California Historical Artillery Society powder

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					                  California Historical Artillery Society
        Safety Rules and Procedures for Muzzle Loading Artillery
                             2 August, 1998

GENERAL INFORMATION
The safety rules and procedures outlined below reflect the generally accepted practices of
the Civil War artillery reenactment community and are based on the safety rules of the
National Civil War Association, the National Safety Rules and Procedures for Shooting
Muzzleloading Artillery adopted by the American Artillery Association and the National
Muzzle Loading Rifle Association, the National Park Service regulations for firing
muzzle loading cannons, and the school of the piece as described in Nice Boom: The
American Civil War Artillery Reenactor’s Handbook, the 5th Massachusetts Battery Field
Training Manual, and the 1864 edition of Instruction for Field Artillery.

SAFETY RESPONSIBILITIES
During reenactments or demonstrations, the officers and senior non-commisioned officers
of the battery act as the safety officers for the battery. They are responsible for the
movement and placement of the guns and limbers on the field, the establishment and
monitoring of artillery safety zones, controlling the rate of fire, and coordinating the
action of the battery in accordance with the approved scenario.

The Chief of the Piece has the final say on loading and firing of his particular gun.
It is his judgement on distances and safety as to when to secure the piece.

However, safety is everyone’s concern. Safe cannon firing is a team effort. Canoneers
will watch each other to assure that no one unconsciously jeoparizes the safety of the
detachment. Anyone seeing an unsafe act can call “cease firing.”

SAFETY ZONE
Establish a 60-foot wide safety zone between the spectators and the gun. Only crew
members or authorized personnel are to be in this zone. When the piece is in the field
and in action, no one should cross in front of the muzzle at any time during the
cleaning, loading, or firing procedure.

The ammunition box shall be located a minimum of 30 feet behind the gun and attended
at all times or locked.

No smoking at any time within safety zones.

After seating the charge, the number 1 will place his rammer staff vertically on the right
hub of the wheel of the piece, sponge head up, to indicate the piece is loaded. In case of a
misfire or if troops enter the 60 foot frontal safety zone before the piece can be fired,
numbers 1 and 2 will cross the rammers over the top of the wheels and tube - forming an
“X” - to signal that the piece is loaded and must be avoided.


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Under no circumstances will the piece be fired while troops or spectators are in the
60 foot frontal safety area.

EQUIPMENT REQUIRED
Ammunition box with self closing lid restricted to opening no greater than 80-degree
angle. Vent brush or vent cleaning device, vent pick, thumbstall, heavy leather welders
gloves (three pair minimum), gimlet, wet sponge, dry sponge, worm, water bucket,
lanyard, leather haversack for use as ammunition pass box and a separate leather pouch
for priming materials, high intensity flashlight or mirror, and a stopwatch or other timing
device.

GUN CREW SAFETY POLICIES
Each piece will be crewed by a minimum of four CHAS certified cannoneers (duties of
the crew are detailed in the CHAS Manual of the Piece). At least one of them will be
CHAS certified at the Gunner level. If the designated Chief of the Piece is not present,
one of the battery senior NCOs or an officer will act as the safety officer of the piece.

No drinking of alcoholic beverages for 10 hours prior to serving on a cannon crew. Any
crew member showing signs of the effects of alcohol or other drugs will be replaced.

Heavy welding gloves will be worn by canoneers 1 and 2. Number 3 will wear a glove or
thumbstall on his left hand. Number 4 will wear a glove on his right hand.

All cannoneers will wear hearing protection.

At the beginning of each reenactment or demonstration prior to loading any piece, the
bore will be searched with the worm and inspected using a flash light or mirror to assure
no debris is in the muzzle.

The vent will be cleaned and bore will be searched, wet sponged, drained, and dry
sponged between each round.

A minimum three minute interval between firing and the introduction of a new
charge into the bore will be adhered to by all gun crews. The Chief of the Piece will
have a timepiece to ensure that three minutes has elapsed before the piece is reloaded.

STANDARD FIRING PROCEDURES
The following safe shooting procedure presumes the crew is firing blank charges or
projectiles with a muzzle loading artillery piece made or altered to modern safety
standards. If firing blanks, skip step 7. The bore should be lined with a minimum 3/8-
inch wall thickness and a yield strength if 85,000 p.s.i. or greater. The breechplug should
be threaded and pinned. Welded and pinned breechplugs can be equally strong but
required expert installation by competent manufacturers. Sand-cored bores are not
recommended for shooting. The vent should be drilled in a threaded copper bolt similar

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to original cannon vent liners of the 1840-1865 period in order to provide an unbroken
passage through the casting and the liner into the bore.

CLEAN THE VENT Clean the vent as the first step in each cleaning, loading, firing
  sequence
     a. Use a .22 cal or appropriately sized bronze cleaning brush on a suitable rod and
        brush the entire vent twice (2 times).
     b. If no brush is available, the alternate method is to run the priming pick or
        gimlet up and down the vent twice (2 times), twisting it to make sure the vent
        is completely free of powder bag remnant

STOP THE VENT Seal the vent with thumb pressure during the entire cleaning and
  loading procedure. This means no air should escape the vent from the time the worm
  enters the muzzle until the rammer is removed after the charge or projectile has been
  seated. Use a leather thumbstall or heavy welders glove to protect your thumb and
  make a tight seal.

WORM THE BORE Using a tool with two sharp steel points which replicates an
  original cannon cleaning worm, worm the bore twice (2 times). Give two(2) complete
  turns of the worm at the breech each time to pick up any powder container remnants
  and to loosen any powder residue. The worm should fit closely so the points will pick
  up debris easily.

WET SPONGE THE BORE
     a. Sponge with a wet (but not sopping) tight-fitting sponge with a head of
        lambswool or wool carpeting over a wooden cylinder affixed to a shaft at least
        one foot longer than the bore. The end of the sponge head should conform to
        the shape of the breechplug (hemispherical or flat)
     b. Seat the sponge against the breech with hand pressure and give two(2) full
        rotations of the shaft. Withdraw the sponge half-length, twist then reseat
        against the breech and give another two(2) full rotations.
     c. Remove the sponge. If any powder container remnants or unburned powder
        comes out with the sponge, repeat the entire process, starting with Step 3
        WORM THE BORE.

DRAIN THE BORE After wet sponging the command to “depress the muzzle” will be
  given. The muzzle will remain depressed until all the excess water has drained out.
  The order to “elevate the muzzle” will then be given and the tube will be gently
  returned to its position on the elevating screw.

DRY SPONGE THE BORE After draining, the same procedure that was used in step 4,
  is used with the dry sponge. The dry sponge is cleaned and dried off periodically with
  an absorbent towel-type rag. The purpose of the dry sponge is to remove excess
  moisture form the bore; if water is left in the bore it may cause incomplete burning of
  the next powder charge, leaving dangerously glowing residue. You may wish to

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   check to see if the bore is clean by using a high intensity flashlight or mirror. If
   anything is spotted, repeat the cleaning procedure.

LOAD POWDER
       a. A “Mississippi” style rammer with a smoothly tapered head will be used, so
  that             it might force the hand open should a premature ignition occur. Staffs
  should                   be dense hard wood (ash or maple).
                        b. Mark the rammer in advance in two (2) places, one to show the
  amount of                shaft which should be left when the charge is fully seated and
  the second to                    show the shaft remaining when the projectile is fully
  seated.                              c. The ammunition chest should be located 30 feet
  behind the gun and 30 feet                      forward of the spectator line. Spectators
  smoke! Watch out for them! Powder               charges should be prepared in advance as
  specified in Safety Regulations 1 and                  2 below, wrapped in heavy duty
  aluminum foil.                                              d. Open the chest only long
  enough to remove one foil wrapped charge and                   transfer it to a leather
  haversack. Do not open chest following warning that a                  gun is about to fire
  until 10 seconds after the gun has been discharged. This is                      to prevent
  hot vent debris from falling into the chest.                                 e. Carry the
  foil wrapped charge within leather haversack to the gun. Do not
  proceed to load until three (3) minutes has elapsed since the gun was last fired,
     even though cleaning has been completed. Use a stopwatch.
       f. Remove foil-wrapped charge and place it in the muzzle with one hand while
          wearing heavy welding gloves.
       g. Wearing heavy welding gloves, stand to the side of the barrel with as much of
          your body as possible behind the plane of the muzzle. Grasp the rammer
          underhand, with one hand, thumb-to-the-side. Seat the charge lightly with
          smooth, short strokes. Do not pound the rammer against the charge.
       h. Immediately upon feeling the charge reach the breech, drop your hand away,
          releasing the rammer. After ten (10) seconds and after ascertaining the charge
          is fully home (according to the rammer marks) remove the rammer, one hand,
          underhand, thumb-to-the-side. This may require grasping and releasing the
          shaft a few times. At no time should more of the body than absolutely
          necessary be forward of the muzzle face and never in front of it. Never have
          two (2) hands on the rammer. When firing blanks, the vent may be released
          after the charge is seated. If firing blanks proceed to step 9.

LOAD PROJECTILE
    a. The projectile loading procedure is the same as that for powder. The rammer is
       operated with short strokes, one hand, underhand, thumb-to-the-side, until
       the mark shows the projectile has been fully seated.
    b. As with all muzzleloaders, to avoid bursting the barrel is essential there is no
       air gap between powder charge and projectile when the gun is fired.
    c. When the rammer is removed, after the projectile is seated, the vent may be


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          released.

PICK THE CHARGE
     a. To insure ignition, pick the powder charge wrapper through the vent with a
        pick or gimlet held by the shaft, between glove protected fingers.
     b. The pick should be not so long that it reaches the bottom of the bore when
        fully inserted so as to avoid making a pit under the vent.

PRIME
    a. Priming the vent depends on the type of ignition to be used. The preferred
       method is the use of friction primers.Typical systems are: linstock and priming
       powder, fuse, priming quills, friction primers, .22 blank, and percussion cap.
    b. If priming powder is used, prime from an open-topped container constructed to
       hold just enough 4F or 3F powder to fill the vent. The priming device should
       have a handle so that the hand is never over the vent when pouring the loose
       powder. A .38 or .45 caliber case soldered to a twisted wire handle works
       well. Priming is not done directly from powder horns or flasks.
    c. When using fuse, priming quills, friction primers, percussion caps or .22
       blanks, hot debris is apt to be blown out the vent on discharge. Crew members
       should wear hats for protection, spectators kept at a safe distance and all
       ammunition chests closed whenever any gun is firing. Caution: fuse is often a
       source of misfires and ignition delay which may provide opportunity for
       children, pets, photographers or others to advance beyond the safety zone.
       Instant types of ignition are recommended.

FIRE THE GUN
      a. The man designated to ignite the charge (the No. 4 man in Civil War period
          drill) calls out “Ready” in a loud voice to alert other crews on the line
          that the gun is about to fire and to notify the Chief of the Piece that the piece is
          primed. At this call, any open ammunition chests are immediately closed. The
                   Chief of the Piece calls out “Clear Front” in a loud voice, pausing at
  least three              (3) seconds, while looking to the left, center, then to the right
  making a visual                  inspection of the range forward of the muzzle to make
  sure no one                             (photographers, children, pets, etc.) is in danger.
  When the Chief of the Piece                      has determined that the minimum safety
  range is clear, he then commands                        “Fire”. The No. 4 man then pulls
  the lanyard and the primer is ignited.                       b. Priming powder, fuse, and
  priming quills are ignited with a linstock which is                     long enough to
  allow the cannoneer to move outside the wheels. The linstock                     holds the
  burning slow match made of cotton rope impregnated with potassium                nitrate or
  lead acetate to make it burn.                                                         c. If a
  lanyard is used to ignite friction primers, or to activate a lock ring
     percussion caps or blank cartridge, it also should be long enough to allow the
          cannoneer to stand outside the wheels and out of the way of recoil.
      d. Start you stopwatch to be sure at least three (3) minutes elapses before

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           powder is reloaded.



 MISFIRE PROCEDURES
 If the primer ignites, but the gun fails to fire:
         a. Command: “Do not advance, the primer has failed.” Start the stopwatch.
            Place the rammers across the barrel of the gun to form an “X”, to alert others
            to the misfire. Wait three (3) minutes.
         b. When three (3) minutes has elapsed, step inside the wheel from the front of the
                    axle so you will be out of the recoil path should the gun discharge
                    unexpectedly. Do not get in front of the muzzle at any time. If the
gun is              less than a full size barrel or barrel is less than five (5) feet in length,
this                position might put you in danger of muzzle flash so you will have to
work                behind the axle. Use good judgment. Estimate recoil distance and
stand well                  back from the axle.
                         c. Wearing gloves, use a gimlet to clear the vent. Grasp by shaft
only. Keep                  head away from vent. When vent is clear, reprime and fire.
                         d. If three attempts fail to fire the gun, flood bore and vent with
water and worm                       after thorough soaking.

POWDER AND PROJECTILE SAFETY
Maximum blank powder charges for properly constructed guns of 3-inch bore or larger,
should not exceed 2 oz. of Fg grade or 3 oz. Cannon Grade GOEX black powder per inch
of bore diameter. Maximum powder charge for bore more than 2-inches and less than 3-
inches should not exceed a total of 3 oz. Fg or 4 oz. Cannon Grade. Use reduced loads
with projectiles.

Prepare powder charges in advance using a triple layer of double-thickness heavy-duty
aluminum foil (6 layers total).

When firing blanks wadding will not be used. It is not needed for a realistic report.

Projectiles shall be constructed so that they easily pass through a sizing gauge with finger
or thumb pressure only. The sizing gauge to be a length at least 1.5 times the length of
the projectile and an inner diameter no greater than the bore diameter when the barrel was
new.

Projectiles should not weigh more than one half the weight of projectiles used in original
issue guns of same bore diameter.




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