Beretta SO10 Instruction Manual

–  89 –
•When the rear key has been removed, insert it a couple of turns in the threaded hole in the centre of the
slot for the key handle (Fig. 24) and pull gently to remove the side plate from the receiver (Fig. 25).
NOTICE:The plate on the other side (on the right of the receiver) is no longer held in position by the keys
and could fall out, so hold it in position with one hand as you remove the left side plate. 
•If the right side plate does not easily detach from the receiver, insert the rear key in...

–  90 –
•Press the left and right side plates to make sure they are in position. Insert the front (longer) key and
rotate it clockwise about 3 turns (Fig. 29). Do not tighten, and leave the handle in the vertical position.
•Holding the side plates flush with the surface of the receiver and stock, tighten the rear key to engage the
other side plate (Fig. 30). Leave the handle in the vertical position.
•Now tighten the front key and lower the handle into the slot (Fig. 31).
•When you are sure that the rear...

–  91 –
NOTICE: Once the shotgun is handled, always and accurately clean all external surfaces (wood and metal)
with a soft and clean patch in order to preserve the delicate finishes over time.  The Beretta Cleaning Cloth
(FAW08) is specially designed to clean your fine shotgun.  If the visible firing mechanisms reveal fingerprints
or dirt, carefully clean them lightly with the supplied bristle-brush and lubricate them with Beretta -
Interflon
®lubricant with Teflon®(product code OL38), or other high...

–  92 –
The new “SP” (Steel Proof) Beretta stainless steel Optimachoke®tubes are designed for use also with factory
steel shot cartridges loaded to standard specifications. When firing steel shot cartridges, with fixed-choke
barrels or with Beretta stainless steel Optimachoke
®tubes, the best results are obtained using open chokes
(C0000/CL, 0000/IC, 000/M). When utilizing steel shot, Full choke constrictions (0/F, 00/M) do not increase
pattern density and will distort normal pattern density associated...

–  93 –
REMOVAL OF CHOKE TUBES
WARNING:Check the firearm is unloaded. If not, unload the firearm by operating as described  in the
paragraph:  “UNLOADING THE SHOTGUN”.
WARNING:Never look into the muzzle or change tubes on a loaded shotgun, even with safety engaged.
•Either open the shotgun or lift the barrels out of the receiver.
•Unscrew (anticlockwise) the choke tubes with the Beretta spanner supplied.
•Remove the choke tubes from the muzzle.
CLEANING OF CHOKE TUBES
WARNING:Check the firearm is...

–  94 –
NOTICE:Once the shotgun is handled, always and accurately clean all external surfaces (wood and metal)
with a soft and clean patch in order to preserve the delicate finishes over time.  The Beretta Cleaning Cloth
(FAW08) is specially designed to clean your fine shotgun.  If the visible firing mechanisms reveal fingerprints
or dirt, carefully clean them lightly with the supplied bristle-brush and lubricate them with Beretta-
Interflon
®lubricant with Teflon®(product code OL38), or other high...

–  95 –
•Carefully hand screw the chokes into the barrels clockwise.  Using the Beretta spanner tighten the chokes
until they are fully bottomed into their recesses in the barrels.
•Remember to remove the spanner after tightening.
WARNING: Periodically check, with the chambers unloaded and opened, whether the chokes are fully and
tightly set into the barrels.  If necessary, firmly tighten the chokes, using the Beretta spanner, until they can
be tightened no more.This tightening is needed to avoid damage...

–  96 –
WARNING:Before cleaning, make sure the shotgun is unloaded.  If not, unloaded it by operating as
described in the paragraph: “ UNLOADING THE SHOTGUN”. 
WARNING:The shotgun should not be disassembled for cleaning beyond what is described below. Only a
qualified gunsmith should conduct further disassembly. 
WARNING:Do not attempt to alter the internal parts or the firing mechanism of the shotgun. Alterations
to the internal components can result in a very dangerous situation. Altering the internal...

–  97 –
•Disassemble the shotgun. 
•Clean the bores (inside of the barrels) with care by passing the supplied cleaning rod and a cotton patch
soaked in a quality Gun solvent or using the bristle-brush. To remove heavier combustion residues fit the
bronze brush on the cleaning rod. Also include the chambers in your cleaning operation, using, if
necessary, the bronze wire brush fitted onto the cleaning rod handle. 
•Run a soft clean non-fluffy patch through the bores to remove solvent residue.
•Lightly...

–  98 –
NOTICE:Never oil the wood. The stock and fore-end only need to be cleaned and polished with a soft
clean patch.  The Beretta Cleaning Cloth (FAW08) is specially suited for this operation.  Remember to
replace the cloth when it is dry or dirty.
WARNING:Excess oil and grease obstructing the bore - even partially - is very dangerous when firing and
may cause damages to the shotgun and serious injury to the shooter and bystanders.
Never spray or apply oil to the shotshells.
Use lubricants properly:...