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
Reloading
Need some help from quickload for 460 Weatherby
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="Veteran" data-source="post: 2240913" data-attributes="member: 118038"><p>The REALLY BIG issue with Quickload is what brass you are using and how it fireforms in your particular rifle! </p><p></p><p>My fired Lapua Brass for .338 Lapua Mag. measures about 116.1 volume for water. But Hornady Brass was only 107!!!!!!</p><p>B</p><p></p><p>I have found Lapua is always in the 115-116 range. PPU is 114 or so, but Hornady is really small, at 107. </p><p></p><p>Do you realize the difference that can make on predicted and actual pressure and velocity? It is tremendously volatile and variable unless you measure everything you are doing for your own specific case........no pun intended.....</p><p></p><p>That brass case is the volume in which the explosion takes place, and when you reduce the case size from 116 to 107, the pressure from the explosion doesn't vary just linearly by that 8-10% case volume difference, it varies exponentially in a non-linear fashion, and you could get not 8-10% more pressure, (which may still may blow you up) but say 15-25% which sure as heck will blow you up if you thought you were shooting a load with 55,000 modeled psi, and instead its 69,000 psi or more.</p><p></p><p>Not only does the brass volume vary all over the map, but I have found that from lot to lot powder can vary in its actual burn rate by 10-20% vs. the advertised burn rates. So, if you couple a small volume case of brass with an out of whack high burn rate lot of </p><p>powder, you can lose some fingers........</p><p></p><p>Brass Volume is absolutely the whole key to using Quick Load intelligently and safely. Just my opinion.... Powder Lot burn rates and temperature will be right in there as second and third issue. Bullet seating depth can also make some difference on the margin, and may be the final last straw if everything else is on the edge. Boom!</p></blockquote><p></p>
[QUOTE="Veteran, post: 2240913, member: 118038"] The REALLY BIG issue with Quickload is what brass you are using and how it fireforms in your particular rifle! My fired Lapua Brass for .338 Lapua Mag. measures about 116.1 volume for water. But Hornady Brass was only 107!!!!!! B I have found Lapua is always in the 115-116 range. PPU is 114 or so, but Hornady is really small, at 107. Do you realize the difference that can make on predicted and actual pressure and velocity? It is tremendously volatile and variable unless you measure everything you are doing for your own specific case........no pun intended..... That brass case is the volume in which the explosion takes place, and when you reduce the case size from 116 to 107, the pressure from the explosion doesn't vary just linearly by that 8-10% case volume difference, it varies exponentially in a non-linear fashion, and you could get not 8-10% more pressure, (which may still may blow you up) but say 15-25% which sure as heck will blow you up if you thought you were shooting a load with 55,000 modeled psi, and instead its 69,000 psi or more. Not only does the brass volume vary all over the map, but I have found that from lot to lot powder can vary in its actual burn rate by 10-20% vs. the advertised burn rates. So, if you couple a small volume case of brass with an out of whack high burn rate lot of powder, you can lose some fingers........ Brass Volume is absolutely the whole key to using Quick Load intelligently and safely. Just my opinion.... Powder Lot burn rates and temperature will be right in there as second and third issue. Bullet seating depth can also make some difference on the margin, and may be the final last straw if everything else is on the edge. Boom! [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Need some help from quickload for 460 Weatherby
Top