Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics Question
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Bart B" data-source="post: 654944" data-attributes="member: 5302"><p>The difference:</p><p></p><p>Angular MOA typically means 1.0472 inch per hundred yards. It's based on what the sine of 1/60th of a degree subtends at 100 yards.</p><p></p><p>MOA typically meant, in the shooting sports for over a hundred years, means 1 inch per hundred yards. Nowadays, it is sometimes stated as inches per hundred yards or IPHY. Scopes calibrated for this typically have their specs written to say 1/8" or 1/4" per click. </p><p></p><p>Here's some quotes from Sightron's web site for their scope you have:</p><p></p><p><strong>Click Value 1/4 MOA </strong></p><p><strong></strong></p><p><strong>Windage and Elevation Movement Table</strong></p><p><strong>Click Value 50 Yards 100 Yards 200 Yards 300 Yards</strong></p><p><strong>1/8 Minute 1/16"........ 1/8"........ 1/4"....... 3/8"</strong></p><p><strong>1/4 Minute 1/8".......... 1/4"........ 1/2"....... 3/4"</strong></p><p></p><p>If Sightron claims that scope's calibrated for angular MOA, ask them why their online specs and manuals don't state that, but instead state it's calibrated for inches per hundred yards.</p><p></p><p>The only way they could possibly "recalibrate" it is to replace all the lenses in the scope such that they end up exactly with design specs for them. I don't think they'll machine two new sets of adjustment hardware just for your scope. If that's what's done, I'd be very interested in what another test would show.</p><p></p><p>Some years ago, Nightforce sent me two of their high end scopes to check for range focus and adjustment accuracy on my optical bench collimator. With both objective lenses set for infinity, one focused at 225 yards with adjustments about 4% off perfect and the other focused at 175 yards with about 6% adjustment error. </p><p></p><p>If one expects precision adjustments in their rifle scope, they better find out if their scope really has it.</p></blockquote><p></p>
[QUOTE="Bart B, post: 654944, member: 5302"] The difference: Angular MOA typically means 1.0472 inch per hundred yards. It's based on what the sine of 1/60th of a degree subtends at 100 yards. MOA typically meant, in the shooting sports for over a hundred years, means 1 inch per hundred yards. Nowadays, it is sometimes stated as inches per hundred yards or IPHY. Scopes calibrated for this typically have their specs written to say 1/8" or 1/4" per click. Here's some quotes from Sightron's web site for their scope you have: [B]Click Value 1/4 MOA Windage and Elevation Movement Table Click Value 50 Yards 100 Yards 200 Yards 300 Yards 1/8 Minute 1/16”........ 1/8”........ 1/4”....... 3/8” 1/4 Minute 1/8”.......... 1/4”........ 1/2”....... 3/4”[/B] If Sightron claims that scope's calibrated for angular MOA, ask them why their online specs and manuals don't state that, but instead state it's calibrated for inches per hundred yards. The only way they could possibly "recalibrate" it is to replace all the lenses in the scope such that they end up exactly with design specs for them. I don't think they'll machine two new sets of adjustment hardware just for your scope. If that's what's done, I'd be very interested in what another test would show. Some years ago, Nightforce sent me two of their high end scopes to check for range focus and adjustment accuracy on my optical bench collimator. With both objective lenses set for infinity, one focused at 225 yards with adjustments about 4% off perfect and the other focused at 175 yards with about 6% adjustment error. If one expects precision adjustments in their rifle scope, they better find out if their scope really has it. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics Question
Top