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
Heavy bullets vs.light bullets
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: 655595" data-attributes="member: 5302"><p>With both bullets having the same time of flight to the 1000 yard target and 10 mph cross wind, the heavier one with a higher BC drifts less.</p><p></p><p>Sierra 155-gr. HPMK, BC=.470, leaving at 3000 fps, 1.5145 second TOF, at 1000 yards drift = 90.6 inches</p><p></p><p>Sierra 200-gr. HPMK, BC=.560, leaving at 2807.2 fps, 1.5145 second TOF, at 1000 yards drift = 78.5 inches</p><p></p><p>For the 200 grain one to have the same drift as the 155:</p><p></p><p>Sierra 200-gr. HPMK, BC=.560, leaving at 2545 fps, 1.6933 second TOF, at 1000 yards drift = 90.6 inches</p><p></p><p>As long as the 200 has a time of flight less than .1788 seconds longer than the 155 leaving at 3000 fps, it'll drift less. </p><p>That is, if my math's right. I don't do these things too well any more.</p></blockquote><p></p>
[QUOTE="Bart B, post: 655595, member: 5302"] With both bullets having the same time of flight to the 1000 yard target and 10 mph cross wind, the heavier one with a higher BC drifts less. Sierra 155-gr. HPMK, BC=.470, leaving at 3000 fps, 1.5145 second TOF, at 1000 yards drift = 90.6 inches Sierra 200-gr. HPMK, BC=.560, leaving at 2807.2 fps, 1.5145 second TOF, at 1000 yards drift = 78.5 inches For the 200 grain one to have the same drift as the 155: Sierra 200-gr. HPMK, BC=.560, leaving at 2545 fps, 1.6933 second TOF, at 1000 yards drift = 90.6 inches As long as the 200 has a time of flight less than .1788 seconds longer than the 155 leaving at 3000 fps, it'll drift less. That is, if my math's right. I don't do these things too well any more. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Heavy bullets vs.light bullets
Top