Precision & Custom Rifles offer rifle actions in either right or
left hand bolt and loading ports to suit left or right hand feed. We
also supply custom barrelled actions or complete Kershaw classic
hunting rifles with calibres to suit the individual's taste.
The Hunter rifles are made to the same exacting standards as all
Kershaw rifles but with the features hunters demand. All rifles
feature a fully adjustable trigger set to your specifications.
Choose from a variety of stock designs in either composite,
laminated or Turkish walnut. Other options include blind magazine,
hinged floor plate or detachable box magazine, muzzle brakes and
fluted barrels, all resulting in the most accurate hunting rifle in
The Varmint rifles were designed for extreme accuracy in an
environment where the need for repeated use is essential. Kershaw's
Varmint rifles are typically built on one of our single shot actions
with a heavy, target barrel. Some calibre's are available in a
repeater. Stocks are either a wood laminate or composite. The wood
laminate stock was designed to shoot from a rest as well as being
comfortable to carry and shoot from a bipod. The composite stocks
are lighter weight and typically carried in the field.
Kershaw actions are used by the finest rifle manufacturers in the
world to build extremely accurate rifles. The same technology used
in the manufacture of the actions has been incorporated into the
Kershaw line of rifles. The heart of the rifle is a Kershaw action
mated to a match grade stainless steel barrel. The same level of
quality, manufacturing expertise and inspection requirements used in
the manufacture of the actions is applied to rifle building. Kershaw
breaks in the barrel and test fires all rifles for accuracy and
reliability prior to shipping. This ensures that the rifle you
receive will exceed your expectations right out of the box.
Kershaw bolts are machined from heat-treated 4340 Chrom-Moly,
guaranteeing they will not fail under even the hardest use.
Kershaw stocks are bedded using stainless steel pillars, providing
stress free exact alignment of the barrelled action, ensuring
Tactical rifles incorporate a MIL-STD-1913 scope mount bolted to the
receiver with six oversized (8-40 or 4mm) screws and two steel press
Field rifle bolt handles are engineered closer to the stock,
providing more clearance for low mounted scopes (shown with the
extended length tactical bolt knob).
The Hunter rifles are made to the same exacting standards as all
Kershaw rifles but with the features hunters demand. All rifles
feature a fully adjustable Arnold Jewell trigger unit, set to your
specification (2ozs to 3lbs). Choose from a variety of stock designs
and colour from McMillan fibreglass, Kershaw composite, laminate or
Kershaw rifles stocks are bedded using stainless steel pillars,
providing stress free exact alignment of the barrelled action,
ensuring long-term accuracy. Other options include blind fitting
magazine, hinged floor plate or detachable magazine.
The varmint rifles are designed for extreme accuracy in an
environment where the need for repeated use is essential.
Kershaw varmint rifles are typically built on one of their single
shot actions with a heavy target barrel. Some calibres are available
The choice of barrel manufacturers is unlimited, Krieger, Walther,
Sassen and Lija. The barrel will be made to your specification,
barrel contour 3 to 8 fluted and twist rate to suit your bullet
Chambering, the choice is yours - a choice of calibres, including
Ackley Imps and many wildcats.
Kershaw Rifles have a wide variety of match-grade chamber reamers
and can supply barrels with minimum CIP specification chambers or
with custom dimensions to suit individual requirements.
This Kershaw rifle (below) is .243 Ack Imp 40deg, with nk .270
During the fire forming process from .243 standard Winchester cases
to .243 Ack Imp 40deg. The results were just unbelievable 5 shot
group at 100m and clover-leaf performance and these results have
All Kershaw rifles are built to order and take around 4 months to
build. Prices supplied on application to your exacting
I work to a maximum tolerance of 0.0001" in setting up the barrel
for chambering, threading and crowning. Everything is checked and
rechecked with a Swiss Interapid 0.0001" test indicator. In setting
up the barrel for chambering, the appropriate point is selected to
be able to dial in the run-out to 0.0001" at the finished throat of
All prices on application.
The firm of LOTHAR WALTHER Precision Tool Manufacture GmbH, 89551
Königsbronn, Germany hereby warrants that its gun barrels and gun
barrel blanks have been manufactured in accordance with the relevant
guidelines on the Firearms Act and have left our premises in perfect
After assembly, each barrel, in conjunction with the statutory
regulations in Germany, the regulations laid down for testing gun
barrels (CIP standard), must be presented to a Firearms Office for
testing and the initial firing, which must be carried out there. In
countries which do not have similar regulations or which do not
belong to the CIP, the testing and initial firing must be carried
out in accordance with the principles of the German and CIP
regulations. A copy of these are available on request.
Following the above mentioned testing, only newly manufactured
ammunition may be used and no guarantee can be accepted for
hand-loaded, reloaded or remanufactured ammunition. This includes
surplus ammunition or any ammunition that contains defects, known or
unknown. Furthermore, the barrel must be kept clean at all times.
Any alterations made to the barrel after manufacture shall void our
manufacturer's warranty. We should emphasize that any gun is a
dangerous weapon and should consequently be handled with care. The
user and those nearby must take the appropriate measures to ensure
that others can never be put at risk. This naturally includes
protection for eyes and ears. Guns should never be pointed, aimed or
fired at people. Representations made by persons other than the
manufacturer do not constitute a part of this guarantee.
Since some gun barrels are designed for a particular purpose, the
use of these barrels for a purpose different than the originally
intended could cause an unsafe situation. Before using any gun
barrels for a different purpose, the manufacturer must be consulted
as to its safe use.
Should a defect occur nevertheless, the barrel must be returned to
the manufacturer, postage prepaid. The liability of the manufacturer
is limited only to the replacement or repair of the barrel and is at
To view contours click on this link
We rifle by the single-point
cut rifling process. Although our machines are state of- the-art;
the process itself is the oldest and slowest method of rifling a
barrel. The cutter removes .0001 inch or 100 millionth of an inch at
each pass; thus taking several hundred passes to rifle a barrel.
This method produces perfect concentricity between bore and groove,
a very uniform twist rate, and induces no stress into the steel.
This is why we can gain all the benefit of treating the steel
beforehand. There is no additional stress put into the steel by the
machining or rifling method that later has to be relieved.
Along the same lines we do absolutely no straightening of our
barrels as this would only put stress right back into the steel.
Our barrels are lapped after reaming to remove the tool marks and
then lapped again after rifling. It has been said that if a barrel
is cut rifled correctly, it doesn't have to be finish lapped, and to
some extent this is true. It should not have to be lapped to obtain
uniformity of dimensions. This should come from the tooling and
procedures used. But there is a slight improvement in the finish,
and the lay of the finish is in the direction of the bullet travel
so fouling is greatly reduced; and they clean much easier. It takes
longer to finish lap, but it makes a better barrel. We are lapping
to finishes under 16 micro inch in the direction of the bullet
travel. In contrast the government requires only a 32 micro-inch
finish on its M-14 National Match barrels.
Our barrels are held to a tolerance of zero to + .0005 over the
nominal bore and groove dimensions, but the dimensions are uniform
within .0001 throughout the barrel and never bigger at the muzzle
than at the breech. There may, however, be a slight flare at each
end of the barrel from the tools entering and exiting. This is why
you should always remove at least an inch from the muzzle when
fitting any barrel.
On our website you will find
lists of bore diameters, groove diameters, twists, and contours we
consider standards. We can make virtually any bore and groove
dimensions, number of grooves, twist, and contour you may require.
Please note special requirements can add delivery time to your
order. Contouring is included in the barrel price. We can duplicate
any factory contour, or furnish you with one of our contours. Please
no stainless steel contours lighter or smaller than those listed.
There is nothing so important to the making of a good barrel that is
normally so out of the barrel maker's control as is the steel he
uses. It became obvious to us early on that we had to give the steel
mill our own specifications for our steel, accept the higher cost,
and then have each heat tested as it came in to assure compliance to
We started by having exhaustive metallurgical tests run on samples
of both good and bad steel to determine literally right down to the
molecular level what made good barrel steel. Having determined this,
we met with representatives of the steel mill, the metallurgist, and
the heat treated to discuss the results of our findings and to
implement the changes that we needed.
Fluting is now available for Target, AR-15 Varmatch, Palma, and
Sporter Barrels. Fluting increases rigidity and reduces barrel
vibration and whip. Also, by exposing more exterior surface area, it
aids in cooling your Target or Varmint Barrel. The flutes will start
approximately 5 inches in front of the receiver and end
approximately 2 inches from muzzle for mounting sight base or barrel
band. A skip in one flute can be incorporated at 7.200 inches from
receiver to mount scope base.
Fluting is available in chrome moly or stainless steel, .22 through
.388 calibres. The maximum length of barrel blank that can be fluted
is 37 inches, and the longest length of flutes is approximately 34
inches. Additionally the largest outside diameter barrel that can be
fluted is 1.350 inches.
With any premium barrel that has been finish lapped -- such as your
Krieger Barrel --, the lay or direction of the finish is in the
direction of the bullet travel, so fouling is minimal. This is true
of any properly finish-lapped barrel regardless of how it is rifled.
If it is not finish-lapped, there will be reamer marks left in the
bore that are directly across the direction of the bullet travel.
This occurs even in a button-rifled barrel as the button cannot
completely iron out these reamer marks.
Because the lay of the finish is in the direction of the bullet
travel, very little is done to the bore during break-in, but the
throat is another story. When your barrel is chambered, by necessity
there are reamer marks left in the throat that are across the lands,
i.e. across the direction of the bullet travel. In a new barrel they
are very distinct; much like the teeth on a very fine file. When the
bullet is forced into the throat, copper dust is released into the
gas which at this temperature and pressure is actually a plasma. The
copper dust is vaporized in this gas and is carried down the barrel.
As the gas expands and cools, the copper comes out of suspension and
is deposited in the bore. This makes it appear as if the source of
the fouling is the bore when it is actually for the most part the
new throat. If this copper is allowed to stay in the bore, and
subsequent bullets and deposits are fired over it; copper which
adheres well to itself, will build up quickly and may be difficult
to remove later. So when we break in a barrel, our goal is to get
the throat polished without allowing copper to build up in the bore.
This is the reasoning for the "fire-one-shot-and-clean" procedure.
Barrels will vary slightly in how many rounds they take to break in
because of things like slightly different machine-ability of the
steel, or steel chemistry, or the condition of the chambering
reamer, etc. . . For example a chrome moly barrel may take longer to
break in than stainless steel because it is more abrasion resistant
even though it is the same hardness. Also chrome moly has a little
more of an affinity for copper than stainless steel so it will
usually show a little more "color" if you are using a chemical
cleaner. (Chrome moly and stainless steel are different materials
with some things in common and others different.) Rim Fire barrels
can take an extremely long time to break in -- sometimes requiring
several hundred rounds or more. But cleaning can be lengthened to
every 25-50 rounds. The break-in procedure and the clearing
procedure are really the same except for the frequency. Remember the
goal is to get or keep the barrel clean while polishing out the
Finally, the best way to break-in the barrel is to observe when the
barrel is broken in; i.e. when the fouling is reduced. This is
better than some set number of cycles of "shoot and clean" as many
owners report practically no fouling after the first few shots, and
more break-in would be pointless. Conversely, if more is required, a
set number would not address that either. Besides, cleaning is not a
completely benign procedure so it should be done carefully and no
more than necessary.
This section on cleaning is not intended to be a detailed
instruction, but rather to point out a few "do's and don'ts".
Instructions furnished with bore cleaners, equipment, etc. should be
followed unless they would conflict with these "do's and don'ts."
You should use a good quality straight cleaning rod with a freely
rotating handle and a rod guide that fits both your receiver raceway
and the rod snugly. How straight and how snug? The object is to make
sure the rod cannot touch the bore. With service rifle barrels a
good rod and guide set-up is especially important as all the
cleaning must be done from the muzzle and even slight damage to the
barrel crown is extremely detrimental to accuracy.
There are two basic types of bore cleaners -- chemical and abrasive.
The chemical cleaners are usually a blend of various ingredients
including oils and ammonia that attack the copper. The abrasive
cleaners generally contain no chemicals and are an oil, wax, or
grease base with an extremely fine abrasive such as chalk, clay, or
gypsum. They clean by mechanically removing the fouling. Both are
good, and we feel that neither will damage the bore when used
So what is the proper way to use them? First, not all chemical
cleaners are compatible with each other. Some, when used together at
a certain temperature, can cause severe pitting of the barrel --
even stainless steel barrels. It is fine to use two different
cleaners as long as you completely remove the first cleaner from the
barrel before cleaning with the second. And, of course, never mix
them in the same bottle.
Follow instructions on the bottle as far as soak time, etc. . .
Always clean from the breech whenever possible, pushing the patch or
swab up to the muzzle and then back without completely exiting the
muzzle. If you exit the muzzle, the rod is going to touch the bore
and be dragged back in across the crown followed by the patch or
brush. Try to avoid dragging things in and out of the muzzle. It
will eventually cause uneven wear of the crown. Accuracy will suffer
and this can lead you to believe the barrel is shot out, when in
fact, it still may have a lot of serviceable life left. A barrel
with a worn or damaged crown can be re-crowned and accuracy will
The chemical cleaners may be the best way to clean service rifle
barrels that must be cleaned from the muzzle -- i.e. M1 Garand, M14,
etc. . .-- because this method avoids all the scrubbing necessary
with the abrasive cleaners and the danger of damaging the crown. But
again, as long as the rod doesn't touch the crown, abrasive cleaners
should be fine.
Abrasive cleaners work very well. They do not damage the bore, they
clean all types of fouling (copper powder, lead, plastic), and they
have the added advantage of polishing the throat both in "break in"
and later on when the throat begins to roughen again from the rounds
fired. One national champion we know polishes the throats on his
rifles every several hundred rounds or so with diamond paste to
extend their accuracy life.
Again, as with the chemical cleaners, a good rod and rod guide is
necessary. A jag with a patch wrapped around it works well. Apply
the cleaner and begin scrubbing in short, rather fast strokes of
about two to four inches in length. Concentrate most of the strokes
in the throat area decreasing the number as you go toward the
muzzle. Make a few full-length passes while avoiding exiting the
muzzle completely, but do partially exit for about six strokes. You
can avoid accidentally exiting by mounting the rifle in a vice or
holder of some sort and blocking the rod at the muzzle with the wall
or something to keep it from completely exiting.
This sheet is intended to touch on the critical areas of break-in
and cleaning and is not intended as a complete, step-by-step guide
or recommendation of any product.
The following is a guide to "break-in" based on our experience. This
is not a hard and fast rule, only a guide. Some barrel, chamber,
bullet, primer, powder, pressure, velocity etc. combinations may
require more cycles some less!
It is a good idea to just observe what the barrel is telling you
with its fouling pattern. But once it is broken in, there is no need
to continue breaking it in.
Initially you should perform the shoot-one-shot-and-clean cycle for
five cycles. If fouling hasn't reduced, fire five more cycles and so
on until fouling begins to drop off. At that point shoot three shots
before cleaning and observe. If fouling is reduced, fire five shots
before cleaning. It is interesting to shoot groups during the three
and five shot cycles.