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
Freebore in a hunting 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="velocity-is-key" data-source="post: 502900" data-attributes="member: 32874"><p>Freebore concept is simple, volume vs expanding gas has a direct relationship to pressure. Pressure = velocity. The pressure curve is lengthened NOT reduced and is also effected by bore diameter (volume).....</p><p>No freebore = less bullet STOP from 3 stops to 2..</p><p>Get it?</p><p>For those whom actually knows what happends during the ignition process they should understand..</p><p>1. primer ignites, bullet moves, hits lands.</p><p>2.powder ignites bullet moves again.</p><p>3. pressure builds exponentially bullet moves once again all in a billionth of a second...</p><p>Less bullet stops = less variables..</p><p>For the average shooter not in search of the "one ragged hole group" which is what the production rifle cannot expect to accomplish, it does the job fine and with safe higher pressure...</p><p> </p><p>I once had a Accumark 30-378 and did extensive load development when only 378 brass was availiable and not the loaded round ...</p><p>It , with its 3/4" freebore chamber (mark V) was the strongest action I ever loaded for..</p><p>Typically with H50 BMG powder of 126 grains and a noslar 180gr Ballistic tip yielded 3675 FPS when the pressure signs became a question, powder started igniting out of the barrel with hugh muzzle blasts and barrel harmonics caused the rounds to deflect off of the muzzle brake...</p><p> </p><p>I would of loved to see what a 32 inch would have revealed but either way I can be pretty confident that those velocities could never have been reached without "freebore"</p><p>Good luck to all....</p></blockquote><p></p>
[QUOTE="velocity-is-key, post: 502900, member: 32874"] Freebore concept is simple, volume vs expanding gas has a direct relationship to pressure. Pressure = velocity. The pressure curve is lengthened NOT reduced and is also effected by bore diameter (volume)..... No freebore = less bullet STOP from 3 stops to 2.. Get it? For those whom actually knows what happends during the ignition process they should understand.. 1. primer ignites, bullet moves, hits lands. 2.powder ignites bullet moves again. 3. pressure builds exponentially bullet moves once again all in a billionth of a second... Less bullet stops = less variables.. For the average shooter not in search of the "one ragged hole group" which is what the production rifle cannot expect to accomplish, it does the job fine and with safe higher pressure... I once had a Accumark 30-378 and did extensive load development when only 378 brass was availiable and not the loaded round ... It , with its 3/4" freebore chamber (mark V) was the strongest action I ever loaded for.. Typically with H50 BMG powder of 126 grains and a noslar 180gr Ballistic tip yielded 3675 FPS when the pressure signs became a question, powder started igniting out of the barrel with hugh muzzle blasts and barrel harmonics caused the rounds to deflect off of the muzzle brake... I would of loved to see what a 32 inch would have revealed but either way I can be pretty confident that those velocities could never have been reached without "freebore" Good luck to all.... [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Freebore in a hunting rifle.
Top