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
Why you should consider a 223 for a LR rifle
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: 3045515" data-attributes="member: 115658"><p>More info on the .224 62 gr. H ELD-VT</p><p></p><p>Form Factor - from Berger:</p><p></p><p>"A Bullet's <a href="https://bergerbullets.com/nobsbc/what-is-a-bullet-bc/" target="_blank">Ballistic Coefficient</a> is comprised of 3 basic components: Weight, Diameter, and Form Factor. The weight and diameter of the bullet combine to determine the bullets sectional density; that's the amount of mass packed behind the frontal area of the bullet. Then form factor is what describes how streamlined the projectile is. A bullet with a long pointy nose and a boat tail will have less drag, and a lower form factor, than a blunt, flat based bullet. In particular, form factor is a number that relates the drag of a bullet to the drag of a standard such as G1 or G7. G7 form factors for long range bullets are from 0.95 (low drag) down to 0.88 (very low drag) for most typical long range bullets. The lowest drag projectiles made on lathes with very aggressive shapes, <a href="https://bergerbullets.com/product-category/bullets/?caliber=375-caliber" target="_blank">like our solid bullets</a>, can have G7 form factors as low as 0.80, but that's pretty rare."</p><p></p><p><u>"Of the 3 elements that make up BC, form factor is the best way to increase BC because you can improve BC without increasing weight. Adding weight to increase BC depresses your muzzle velocity so there's a trade-off. However, if you simply lower the drag of the bullet (lower form factor), you retain a high muzzle velocity while improving the BC." </u> my underline</p><p></p><p>The tiny .223 Rem has a limited powder capacity & never can equal the velocities of the larger .22-.250 & .22 CM & others. The limited powder capacity & lower velocities may be compensated by using a bullet having a low form factor ("long pointy nose and a boat tail")</p><p></p><p></p><p>[ATTACH=full]548051[/ATTACH]</p><p></p><p>Velocities guess-estimated from various load manuals. 3200 fps looks good for a 62 gr .223 load with 24 inch barrel.</p><p></p><p>A 9 twist .22-.250 would be real nice BUT the little .223 having cheap brass, available small rifle primers, & long barrel life is a practical replacement for some long range needs (with expected limitations).</p></blockquote><p></p>
[QUOTE="Hugnot, post: 3045515, member: 115658"] More info on the .224 62 gr. H ELD-VT Form Factor - from Berger: "A Bullet's [URL='https://bergerbullets.com/nobsbc/what-is-a-bullet-bc/']Ballistic Coefficient[/URL] is comprised of 3 basic components: Weight, Diameter, and Form Factor. The weight and diameter of the bullet combine to determine the bullets sectional density; that's the amount of mass packed behind the frontal area of the bullet. Then form factor is what describes how streamlined the projectile is. A bullet with a long pointy nose and a boat tail will have less drag, and a lower form factor, than a blunt, flat based bullet. In particular, form factor is a number that relates the drag of a bullet to the drag of a standard such as G1 or G7. G7 form factors for long range bullets are from 0.95 (low drag) down to 0.88 (very low drag) for most typical long range bullets. The lowest drag projectiles made on lathes with very aggressive shapes, [URL='https://bergerbullets.com/product-category/bullets/?caliber=375-caliber']like our solid bullets[/URL], can have G7 form factors as low as 0.80, but that's pretty rare." [U]"Of the 3 elements that make up BC, form factor is the best way to increase BC because you can improve BC without increasing weight. Adding weight to increase BC depresses your muzzle velocity so there's a trade-off. However, if you simply lower the drag of the bullet (lower form factor), you retain a high muzzle velocity while improving the BC." [/U] my underline The tiny .223 Rem has a limited powder capacity & never can equal the velocities of the larger .22-.250 & .22 CM & others. The limited powder capacity & lower velocities may be compensated by using a bullet having a low form factor ("long pointy nose and a boat tail") [ATTACH type="full" alt="Screenshot (853).png"]548051[/ATTACH] Velocities guess-estimated from various load manuals. 3200 fps looks good for a 62 gr .223 load with 24 inch barrel. A 9 twist .22-.250 would be real nice BUT the little .223 having cheap brass, available small rifle primers, & long barrel life is a practical replacement for some long range needs (with expected limitations). [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why you should consider a 223 for a LR rifle
Top