General information about aligning the rifle barrels
Blaser BD14 drilling has one shotgun barrel and two rifle barrels (example case .222 Rem and 6.5 x55SE). When shooting with
rifle barrels, it would be meaningful to align the rifle barrels so that both barrels can be fired accurately, without the
riflescope adjustments needed to be tackled.
However, there are two "schools of thought" of the barrel aligning. Others want both barrels to hit, with a selected ammunition,
roughly to the same point. Others want the barrels to hit the target same as the barrels are attached to the weapon. In this
case (the Blaser BD14) a smaller caliber barrel, should be 12.5 mm to the right (see illustration below), the larger caliber
barrel hit point to the bottom.
The Latter aligning method avoids the situation of the first aligning method, where the rifle barrels are in a way cross-firing.
This means that a smaller caliber rifle barrel positioned on the right will shoot, for example, at the distance of 100 m on the
same hit point with a larger caliber rifle barrel. However, due to the aligning of the barrels, the situation at the distance of
200 meters, is so that the right side rifle barrel hits to the left of the larger caliber rifle barrel. With the longer shooting
distance, the bigger the dispersion to the left is with the smaller rifle barrel. This situation cannot be considered desirable.
It is recommended that the barrels should be aligned, with the selected ammunition, a recommended factory-specified shooting
distance (GEE/MRD = Most Recommended Distance).
Rifle barrels aligning
First a larger caliber rifle barrel is aligned, by adjusting the riflescope, on the desired distance. If The alignment is unclear,
first read more about how to align rifle with riflescope
» Riflescope aiming
When the larger caliber rifle barrel hit point is in the center of the target, a smaller caliber rifle barrel aligning is started so
that it can be fired at the distance already selected at roughly the same point as the larger caliber, or alternatively, about 12.5 mm
to the right (pic 2), without the need to interfere with the riflescope adjustments.
For adjusting the alignment of the BD14 -Drilling’s smaller caliber barrel, there are two hexagon adjusting screws (Torx T7). One screw
is in the middle of the barrels (pic 6), and one is in the mouth of the barrels (pic 5), below the front, on the left side. Both adjustment
screws have their own Ø 2.5 mm diameter locking screw, which are on top of the adjusting screws themselves. There are holes in the center
of the locking screws that allow the adjusting screw to turn clockwise or counterclockwise, as necessary. Before this, however, it is
necessary to loosen the locking screw for about a round so that the adjustment screw can be rotated.
Horizontal align adjustment
When adjusting horizontal alignment of the smaller rifle barrel left or right, it must be done using the hexagon screw (Torx T7) at
the front of the barrels (pic 3). When The adjustment screw is rotated clockwise, the barrel hit point is moved to the right. When The
adjustment screw is rotated counterclockwise, the barrel hit point is moved to the left. Note! The Locking screw is not required and
should not be completely removed during adjustment.
Vertical align adjustment
Vertical align adjustment for the smaller rifle barrel must be done using the hexagon screw (Torx T7) (pic 4). When the adjusting screw is
rotated clockwise, the barrel hit point moves upwards. When the adjusting screw is rotated counterclockwise, the barrel hit point downwards.
Rifle barrel alignment
Shoot two shots with both (small and large) rifle barrels.
Determine the difference between the hit points between the two barrels.
Unlock the locking screws by turning the locking screws, one full turn counterclockwise.
When the screw lock is removed, you can turn the adjusting screw yourself in the direction you want, so that the small caliber
barrel turns towards to (or away of) the larger caliber barrels central hit point.
When the adjustment is made, lock the adjustment screws using the locking screws, turning the locking screw clockwise, i.e.
the locking position.
Shoot two shots with a small caliber rifle barrel. If the hit points are now the same as in the picture 2, barrel alignment is
finished. If the hit points are not the same as in the picture 2, repeat steps from step 2. until the hit points are roughly
the same as picture 2.
After this, it is still necessary to check that both barrels shoots as desired. If necessary, you can do so-called refinement adjustment with