by Boundry Rider » 21 Sep 2022, 8:08 pm
As discussed earlier, my response to an additional information request on the application which states one firearm having infrared optic sighting system and one normal glass optic sighting system.
1) Why infrared sighting is not removed for daylight use
2) Why infrared sighting is not used for daylight and night shooting
Please note, I wouldn't copy and paste anything these days, if you see info then extrapolate
"To whom it may concern,
In order to address the request for additional information I have received by mail on 30/08/2019, please refer to the following additional information:
For background reference:
• For the purpose of this caliber .17HMR rifle, the accuracy I require is .25-.75 MOA. Normal range is 45-125Yards. Vital target area for humane eradication is 1.0 MOA, this is not only vital for humane eradication but also for continuation of unaltered behavior of targeted species, as targets are often sniped from foraging groups which require accurate hits.
• Myself and my clients expect one shot per culled animal. This is considered best practice. Unnecessary firing and other unnecessary activity during fixed, stationary comprehensive covert advantage or mobile patrols is counterproductive, and educates/alters behavior of targeted species to the task of eradication, which is contrary to best practice.
• Culling/eradication is performed in portions of varying conditions, for example: sunup conditions on mobile patrol, twilight conditions on mobile patrol and sundown conditions on covert mobile patrol; or a combination of all three conditions whilst fixed, stationary and possibly camouflaged to provide comprehensive covert advantage.
• My rifles and optical aiming systems are fit for purpose, of high quality and value, and are bedded and tool fastened. Lesser variations of optical aiming systems and fastening devices will not provide .25-.75 MOA accuracy required and therefore are not best practice nor fit for purpose.
• Mobile patrol exercises are conducted either on foot or from a vehicle position, a fixed stationary position exercise is executed from either a hide, plain sight site or a vehicle position.
• Subjectively, I will describe the ‘additional’ .17HMR rifle as: Rifle B.
Reason for additional firearm in caliber .17HMR:
• One .17HMR rifle fitted with infra-red scope for sundown conditions: Rifle A.
• One .17HMR rifle fitted with conventional scope for sunup conditions: Rifle B.
• Rifle A has a benchrest style stock/frame used with electronic powered digital infra-red and glass magnification optical aiming system. This infra-red aiming system provides the covert advantage of a nil visible lighting base and is most efficient for eradication via either fixed or mobile covert patrols during twilight and sundown conditions. It requires battery power and can be occasioned with 12V powered ancillary devices requiring the attachment of up to three electrical cables. The ergonomic nature of the benchrest style stock/frame limits its capacity to be effectively used in field/carry denomination.
• Rifle B has a field/carry style stock/frame with a mechanical glass magnification optical aiming system. This is a traditional setup and very accurate during sunup conditions, however which requires a spotlight for use during sundown conditions. The ergonomic nature of the field/carry style stock/frame gives it capacity to be effectively used in field/carry and fixed/stationary/vehicle rest mounting denominations.
Why infrared sighting is not removed for daylight use:
• Most commonly night hunting with this caliber is from a fixed camouflaged advantage position or vehicle mounted position, either of which begins in sunup conditions and continues through twilight into sundown conditions. A simple rifle change from Rifle B to Rifle A is best practice for continuity of covert advantage during either (fixed or vehicle) position and does not require tooling of a firearm or resighting of a firearm.
• If optical aiming system components are uninstalled/installed in the field, continuity of .25-.75 MOA accuracy cannot be guaranteed without firing resighting shots at an initialized target, which is not possible from a covert camouflaged advantage point without spoiling the continuity of covert advantage, therefore is not best practice.
• Resighting firearms in the field during covert patrols causes unnecessary firing noise alerting and educates the species to the eradication task, therefore is counterproductive to the efficiency of the eradication purpose.
• To perform tooled modifications to firearms components without a clinical workspace is not a correct process, therefore not best practice in the field during covert patrols.
• It is not time efficient to be uninstalling/installing firearm components and resighting firearms in the field during covert patrols.
Why infrared sighting is not used for daylight and night shooting:
• The quality of the captured digital image is lessened by 15-40% during sunup conditions causing accuracy to deteriorate to +3MOA, therefore not using Rifle A during sunup patrols is best practice when Rifle B is capable of .25-.75 MOA accuracy in sunup conditions.
• The electronic powered digital infra-red aiming system is a one-piece scope consisting of a series of optical glass magnifiers, a camera and screen and again optical glass magnifiers with a hooded bell eyepiece. Extended time spent in close proximity of the magnified screen for the single eye of the operator using the sunup hooded bell (which limits daylight intrusion on the screen) is not ideal and is to be limited to a minimum for eye health reasons. The hood is not required during sundown conditions, therefore not using Rifle A during sunup conditions is best practice.
• The Rifle A infrared scope is bulky and sensitive to both inclement weather and rough dirty field conditions, such rigorous conditions are conducive to the purpose of a conventional riflescope such as fitted to Rifle B.
• The Rifle A benchrest style stock/frame is bulky and ungainly limiting its capacity to be effectively used in field/carry denomination conditions, such conditions are conducive to the rigorous purpose of a Rifle B, which is fitted with a field/carry style stock/frame."
Escaped WALcatraz