Wallie
Well-Known Member
Like everyone else in this thread I'm very happy with my LabRadar, and its accuracy.
If you are positioning the forward facing surface perpendicular to your muzzle (not the end of a suppressor, and not clear back by your action so it's easier to touch the buttons) it will give you good data.
It's also accepted that every barrel will impart a small, unique, and repeatable change in BC to a projectile, by the way the rifling scribe grooves into the jacket bearing surface, and then those rifling cuts effect drag as the spin through atmosphere. This effect was marginal in my past experience, until I started playing with homogeneous alloy lathe turned projectiles, where the same lot gives noticeably different BC values in different barrels.
The tracking of your turrets is as much as +/- 3%, I've ran into that. Even high end ($3k or more) scopes that I have track +/- 1%. Try inputting 1.1 or .99 in your Strelock as your value per click and see if that doesn't make your dope line up. Test your tracking by performing a tall target test at EXACTLY 100 yards (measured from tip of muzzle to surface of target, measured with a tape measure) and I bet you dollars to doughnuts your scope tracing isn't perfect. None of the dozen or so scopes I've tested have been.
The accuracy of your actual target distance is critical, at 800-1000 yards each foot of actual range makes about a third of an inch of vertical, so being off on range by one yard could cause your 60fps correction also.
You can get in the weeds, or you can just accept that there are tolerances in every part of your shooting system, sometimes they stack with each other some times they offset or cancel each other out. It's very possible to figure out what the tolerances are in your system, (I'd start with scope tracking)
OR just let Strelock change that 60fps, make sure that you get the results on target you want, and drive on with life.
I wish you happiness either way you go. I love this hobby and hope you do too.
If you are positioning the forward facing surface perpendicular to your muzzle (not the end of a suppressor, and not clear back by your action so it's easier to touch the buttons) it will give you good data.
Berger also advertises as the lowest manufacture BC value SD, implicitly stating that the BC value is actually an average of possible values, this from a manufacturing perspective.
It's also accepted that every barrel will impart a small, unique, and repeatable change in BC to a projectile, by the way the rifling scribe grooves into the jacket bearing surface, and then those rifling cuts effect drag as the spin through atmosphere. This effect was marginal in my past experience, until I started playing with homogeneous alloy lathe turned projectiles, where the same lot gives noticeably different BC values in different barrels.
To your point, we don't think YOU are experiencing inaccurate velocity readings with yours. There are many factors that can result in your need to "true" your ballistic problem.
The tracking of your turrets is as much as +/- 3%, I've ran into that. Even high end ($3k or more) scopes that I have track +/- 1%. Try inputting 1.1 or .99 in your Strelock as your value per click and see if that doesn't make your dope line up. Test your tracking by performing a tall target test at EXACTLY 100 yards (measured from tip of muzzle to surface of target, measured with a tape measure) and I bet you dollars to doughnuts your scope tracing isn't perfect. None of the dozen or so scopes I've tested have been.
The accuracy of your actual target distance is critical, at 800-1000 yards each foot of actual range makes about a third of an inch of vertical, so being off on range by one yard could cause your 60fps correction also.
You can get in the weeds, or you can just accept that there are tolerances in every part of your shooting system, sometimes they stack with each other some times they offset or cancel each other out. It's very possible to figure out what the tolerances are in your system, (I'd start with scope tracking)
OR just let Strelock change that 60fps, make sure that you get the results on target you want, and drive on with life.
I wish you happiness either way you go. I love this hobby and hope you do too.
