Today we will show how to finish the installation of the Trilase and Scope, as setup in part one, so that the rifle is fully usable.
The scope has been adjusted with the parallax and ocular adjustment that best suit the scope and the user. After that, the parallax adjustment is best left set and only the magnification adjustment is changed for different ranges. This does have the effect of focusing the scope.
1 Here we have the tools required for the job; rifle, scope, Trilase, eight free standing paper targets, a 1.5mm ball headed allen key and quality pellets. The PCP rifle is fully charged and barrel cleaned before zeroing. This rifle is .22 30 ft/lb, the rifle will be zeroed to 39m. 2 First a target is set out at 14m, the first zero range. These ranges are known, to give a maximum hold-under of about half an inch which is desirable. This can be calculated using the online Chairgun software if required. 3 The scope turret caps are removed from the scope. 4 The magnification has been set to 6x. 5 The first shot at 14m hits low, see the hole in the wood base. 7 The first laser pattern showing the random placement of the lasers following installation. The next shot hits low and left. Note the lasers can be used as a reference whilst zeroing. 8 This is shown, one laser is adjusted so that it is near to the zero. It is simple to adjust the crosshair of the scope to the place where the pellets hits compared with this laser dot. 9 Two more shots and the scope is zeroed to 14m. 10 A target is placed at 39m. 11 The scope is set to 12x. 12 The first new shot hits high and right. 13-14 On the eleventh shot overall the rifle is considered to be correctly zeroed.
15 Next three targets are placed at slightly different distances with the center target about half way between the two zero range targets 14m and 39m. This is done by eye and is used to find the Maximum Ordinate range. 16 The scope is set to 9x. 17-20 With 4 more shots, the center target is found to be at the Maximum Ordinate range. 21-22 The top laser is zeroed first, at the center target at the MO range. The top laser must be considered the primary laser and is best zeroed first. The top laser should remain in the vertex of the reticle at longer distance too. The top laser is zeroed to the center of the reticle using the 1.5mm ball headed allen key and Trilase X-Y grub screw adjustments. Next the left laser from the back of the rifle is zeroed to coincide with the first top laser. This can be checked by seeing that the two lasers ‘cross over’ at the MO range. 23 Next the left laser is covered with a little strip of masking tape, to zero the right laser with the top laser. Note it is easier to zero two lasers at a time rather than three. 24 The right laser is zeroed.
25 A group is taken at 39m to check the aligned lasers do not shift. 26 The fully aligned lasers at the target of range of the maximum ordinate range. 27-28 The laser pattern at 39m, note the dots look sharp through the scope. 29 The laser pattern at the closer central target, note the small upright laser pattern. 30 The laser pattern at the first zero range. 31 Pattern at closer MO test target. 32-33 Pattern at MO range target. 34 Pattern at further MO test target, note upside down triangle coming apart. 35-36 Pattern at 39m zero range target.
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