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
Hunting
Long Range Hunting & Shooting
What would cause this? Bullet drop with elevation change
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="Hugnot" data-source="post: 2049093" data-attributes="member: 115658"><p>We are talking about 2 big inches at a short 100 yards. Logically at 3.5X the distance or at 350 yards it would be 7 inches more drop (3.5 * 2). The OP uses the well known Hodgdon extreme powder H1000 and temps were "similar". The Hornady 200 grain ELDX bullet was used.</p><p></p><p>I have never experienced stuff at real short ranges like 100 yards, caused by temperature, refraction, wet air, or elevation. Taking a look at the Hornady 4DOF calculator this comes down to some 9.31 MOA needed for 500 yards @ 90% humidity & 820" elevation. At 500 yards at 10% humidity & 7200' elevation 9.32 MOA needed to connect. Both with a 100 yard zero. This is only .01 MOA difference. Are the Hornady 4DOF Doppler radar calculations to be trusted?</p><p></p><p>On a past operation, going from my former, friendly, wet, sea level range near Seattle, USA to the blazing dry, hot, mile high rodent grounds of Wyoming, USA I did not need to re-adjust my cheap Weaver Grand Slam 6-20X40 scope to achieve multiple hits on the rodents. In fact, taking a target stuck to a cardboard box with rock inside so it would not blow away, my chosen 1 inch high zero at 200 was verified at a laser measured 200 yards. This is for a .22-.250 shooting 55 grain Sierra GK's at 3600 +-. My rifle had a nice Lilja #5 barrel, free floated, action and barrel shank carefully bedded in a laminated stock, front action screw at 60 inch/lbs. , scope in Ruger rings at 60 in/lbs. at receiver.</p><p></p><p>All this appears, to me as conjecture (there is not enough info) is driving this discussion. At least, I would not have somebody else sight in my rifle. It sort of appears like some kind of multiple user screw-up. Was the shooter aiming directly east so the spinning earth would move his zero away increasing the distance? (not likely with TOF measured in fractions of seconds).</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2049093, member: 115658"] We are talking about 2 big inches at a short 100 yards. Logically at 3.5X the distance or at 350 yards it would be 7 inches more drop (3.5 * 2). The OP uses the well known Hodgdon extreme powder H1000 and temps were "similar". The Hornady 200 grain ELDX bullet was used. I have never experienced stuff at real short ranges like 100 yards, caused by temperature, refraction, wet air, or elevation. Taking a look at the Hornady 4DOF calculator this comes down to some 9.31 MOA needed for 500 yards @ 90% humidity & 820" elevation. At 500 yards at 10% humidity & 7200' elevation 9.32 MOA needed to connect. Both with a 100 yard zero. This is only .01 MOA difference. Are the Hornady 4DOF Doppler radar calculations to be trusted? On a past operation, going from my former, friendly, wet, sea level range near Seattle, USA to the blazing dry, hot, mile high rodent grounds of Wyoming, USA I did not need to re-adjust my cheap Weaver Grand Slam 6-20X40 scope to achieve multiple hits on the rodents. In fact, taking a target stuck to a cardboard box with rock inside so it would not blow away, my chosen 1 inch high zero at 200 was verified at a laser measured 200 yards. This is for a .22-.250 shooting 55 grain Sierra GK's at 3600 +-. My rifle had a nice Lilja #5 barrel, free floated, action and barrel shank carefully bedded in a laminated stock, front action screw at 60 inch/lbs. , scope in Ruger rings at 60 in/lbs. at receiver. All this appears, to me as conjecture (there is not enough info) is driving this discussion. At least, I would not have somebody else sight in my rifle. It sort of appears like some kind of multiple user screw-up. Was the shooter aiming directly east so the spinning earth would move his zero away increasing the distance? (not likely with TOF measured in fractions of seconds). [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
What would cause this? Bullet drop with elevation change
Top