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Hunting
Long Range Hunting & Shooting
Scope or Rail Mounted Anti-cant Level
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<blockquote data-quote="Pro2A" data-source="post: 2085327" data-attributes="member: 17889"><p>Like many individuals spend big money on the rifle and then cheap out on the optics. Most ignore the impact of shooter induced cant. Cant is critical to accurate distance hits. Reference Bryan Litz's ballistic book series for the impact of cant on down range impact between various calibers. All accurate custom rifles and expensive scope repeatability and adjustment accuracy are nullified by the variability in shooter cant error. No you aren't as perfect as you think. Levels are automatically assumed accurate down to the gnat's hair like anything spit out by a computer....but garbage in = garbage out. Levels need to be verified as any thing manufactured. Have checked most of the bubble levels sold by big name shooting manufacturers. The worst was a NF top ring half level........just a little useless......missing the whole level vial......case in point for any thing manufactured.!!!! The NF CS rep basically called me a liar until I sent pics of ring half sans vial in unopened bubble package. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> Levels vary greatly. Before being mis-treated in the field hanging off the side of the rifle, most are 1-3deg off from dead level as confirmed by very expensive, highly accurate machinists levels and dial indicating. Any level is probably better than no level as humans struggle to discern less than about 3 degrees (reference Bryan Litz ballistic books).....especially with common optical reference illusions due to a non-square/plumb world. If using a bubble level, I prefer a picatinny mounted version. You are interested in the relation between the scope reticle/adjustment mechanism and gravity. I like the Sig Tango6 scopes with the internal electronic level feature. Level is right in the scope view......no lifting/peeking to check level.....multiple accuracy settings down to about .2deg as I recall. But, the electronic level I really use the most is the SendIt unit by Long Range Arms. One will initially think it is too pricey at about $230 from Brownells, but really not even a rounding error in what most spend on shooting gear. And, it is easily moved between rifles.....basically nullifies initial cost out of the box versus multiple questionable accuracy bubble levels on multiple rifles. Per Litz, cant will nullify the expenditures on accurate shooting systems, so why skimp on the anti-cant mechanism. The SendIt features easily sensed 5 colored LED indicators......Green = Send It. Colored lights are more easily sensed than having to read a bubble position against scribed lines.....especially in failing light. Using 12 point multi-axis sensors adjustable in 5 sensitivities 1.0deg down to 0.2deg; can be mounted vertically, horizontally, upside down, left or right........and, intended shooter cant can be set. Just a really, really old guy's thoughts and spending comfort. One makes one's choice of warm fuzzy level....pun intended......and pays your money. Buy once; cry once; happy ever after.</p></blockquote><p></p>
[QUOTE="Pro2A, post: 2085327, member: 17889"] Like many individuals spend big money on the rifle and then cheap out on the optics. Most ignore the impact of shooter induced cant. Cant is critical to accurate distance hits. Reference Bryan Litz's ballistic book series for the impact of cant on down range impact between various calibers. All accurate custom rifles and expensive scope repeatability and adjustment accuracy are nullified by the variability in shooter cant error. No you aren't as perfect as you think. Levels are automatically assumed accurate down to the gnat's hair like anything spit out by a computer....but garbage in = garbage out. Levels need to be verified as any thing manufactured. Have checked most of the bubble levels sold by big name shooting manufacturers. The worst was a NF top ring half level........just a little useless......missing the whole level vial......case in point for any thing manufactured.!!!! The NF CS rep basically called me a liar until I sent pics of ring half sans vial in unopened bubble package. :) :) :) Levels vary greatly. Before being mis-treated in the field hanging off the side of the rifle, most are 1-3deg off from dead level as confirmed by very expensive, highly accurate machinists levels and dial indicating. Any level is probably better than no level as humans struggle to discern less than about 3 degrees (reference Bryan Litz ballistic books).....especially with common optical reference illusions due to a non-square/plumb world. If using a bubble level, I prefer a picatinny mounted version. You are interested in the relation between the scope reticle/adjustment mechanism and gravity. I like the Sig Tango6 scopes with the internal electronic level feature. Level is right in the scope view......no lifting/peeking to check level.....multiple accuracy settings down to about .2deg as I recall. But, the electronic level I really use the most is the SendIt unit by Long Range Arms. One will initially think it is too pricey at about $230 from Brownells, but really not even a rounding error in what most spend on shooting gear. And, it is easily moved between rifles.....basically nullifies initial cost out of the box versus multiple questionable accuracy bubble levels on multiple rifles. Per Litz, cant will nullify the expenditures on accurate shooting systems, so why skimp on the anti-cant mechanism. The SendIt features easily sensed 5 colored LED indicators......Green = Send It. Colored lights are more easily sensed than having to read a bubble position against scribed lines.....especially in failing light. Using 12 point multi-axis sensors adjustable in 5 sensitivities 1.0deg down to 0.2deg; can be mounted vertically, horizontally, upside down, left or right........and, intended shooter cant can be set. Just a really, really old guy's thoughts and spending comfort. One makes one's choice of warm fuzzy level....pun intended......and pays your money. Buy once; cry once; happy ever after. [/QUOTE]
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Scope or Rail Mounted Anti-cant Level
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