Standard Euro Slot Dimensions
Last update: 9/5/2016
Those of you that have purchased or are considering picking up one of
have noted that many come without sights. The rear receiver tang is
for installation of your preferred front sight. Most sight suppliers are
more recent Winchester BPCRs are identical to the Browning’s including
dovetail dimensions go to Brownells.com web site and search for
dovetails on rifles, which is something I know a little about. In general
dovetail slot: the opening and end widths, shoulder angle and depth of
axis of the barrel at the bottom of the slot, the widest fore and aft
muzzle pointing forward, is slightly wider than the left end. The
the slot is not tapered it was likely cut with a standard dovetail
and the shoulder angle. The depth of cut is determined by the
shoulders is 3/8” (0.375”) wide at the base and the angle from the
most common dovetail angle used in modern firearms.
If you check with Browning or Winchester, they will likely inform you
to a depth of 0.090”; all of which are accepted as an industry standard
some factory barrel female dovetails slots are slightly oversized on one
dovetail. In my book on the Browning BPCRs I measured several rifles
measure 0.375”, but the right opening of the Miroku/Browning
dovetails on several Miroku/Winchester BPCRs and confirmed
the width to range from 0.373” to 0.377”, confirming a slight taper.
an existing sight by drifting it out from left to right and installing it
not just measure the width of the base of the old sight with a
dovetail bases are slightly rounded on the edges, if for no other reason
narrower dimension than the female dovetail slot. A recent example is
opening width was 0.385”, but the width of the male dovetail base of
use the rear or inside measuring jaws of a caliper on the female slot.
measurement is almost impossible. So what’s the answer? I’m no
one solution is to order a wire gauge dovetail measuring tool from
006-101-000WB ) is $54.00 plus shipping. But the vast majority of
dovetails is not a common occurrence.
Another method is to make a cast of the female dovetail slot using
width of the male dovetail cast is simple. I have not used this method
proper time prior to enlarging and locking itself into the slot. If an
the dovetail is sufficiently coated with a release agent such as paste
sights in dovetails. A brass punch will work but will likely leave a thin
if the sight utilizes a setscrew to lock it into place. I use a short
that I could not remove or install.
One quick technique that works that works for me is to utilize a slightly
gauge width should taper from a dimension narrower than the slot to
a file or sandpaper. The gauge is pushed in by hand and 'wedged' into
start of the dovetail, pull it out and “gently” measure the width at the
technique will result in an adequate measurement. And don’t forget to
slot taper if any exists.
The most accurate technique is to use a couple of precision steel pins
figure below). The distance between the pins is measured with a
the pins are small enough to contact the side of the dovetails below
simplified the formula so you don’t have to figure out the cotangent of
Those of you that have purchased or are considering picking up one of
have noted that many come without sights. The rear receiver tang is
for installation of your preferred front sight. Most sight suppliers are
more recent Winchester BPCRs are identical to the Browning’s including
dovetail dimensions go to Brownells.com web site and search for
dovetails on rifles, which is something I know a little about. In general
dovetail slot: the opening and end widths, shoulder angle and depth of
axis of the barrel at the bottom of the slot, the widest fore and aft
muzzle pointing forward, is slightly wider than the left end. The
the slot is not tapered it was likely cut with a standard dovetail
and the shoulder angle. The depth of cut is determined by the
shoulders is 3/8” (0.375”) wide at the base and the angle from the
most common dovetail angle used in modern firearms.
If you check with Browning or Winchester, they will likely inform you
to a depth of 0.090”; all of which are accepted as an industry standard
some factory barrel female dovetails slots are slightly oversized on one
dovetail. In my book on the Browning BPCRs I measured several rifles
measure 0.375”, but the right opening of the Miroku/Browning
dovetails on several Miroku/Winchester BPCRs and confirmed
the width to range from 0.373” to 0.377”, confirming a slight taper.
an existing sight by drifting it out from left to right and installing it
not just measure the width of the base of the old sight with a
dovetail bases are slightly rounded on the edges, if for no other reason
narrower dimension than the female dovetail slot. A recent example is
opening width was 0.385”, but the width of the male dovetail base of
use the rear or inside measuring jaws of a caliper on the female slot.
measurement is almost impossible. So what’s the answer? I’m no
one solution is to order a wire gauge dovetail measuring tool from
006-101-000WB ) is $54.00 plus shipping. But the vast majority of
dovetails is not a common occurrence.
Another method is to make a cast of the female dovetail slot using
width of the male dovetail cast is simple. I have not used this method
proper time prior to enlarging and locking itself into the slot. If an
the dovetail is sufficiently coated with a release agent such as paste
sights in dovetails. A brass punch will work but will likely leave a thin
if the sight utilizes a setscrew to lock it into place. I use a short
that I could not remove or install.
One quick technique that works that works for me is to utilize a slightly
gauge width should taper from a dimension narrower than the slot to
a file or sandpaper. The gauge is pushed in by hand and 'wedged' into
start of the dovetail, pull it out and “gently” measure the width at the
technique will result in an adequate measurement. And don’t forget to
slot taper if any exists.
The most accurate technique is to use a couple of precision steel pins
figure below). The distance between the pins is measured with a
the pins are small enough to contact the side of the dovetails below
simplified the formula so you don’t have to figure out the cotangent of
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