The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools
Old August 17, 2011, 07:21 PM   #1
Crankgrinder
Senior Member
 
Join Date: July 24, 2011
Location: Texas
Posts: 634
load data figures

some of my data lists "pressure factor" in the form of a decimal ".9353" and so on which can be used to determine aprox. pressures for reduced loads assuming the pressures listed are for the maximum safe loads in each table. can these"pressure factors" or "velocity factors" as some have called it be determined for loads that do not list such? and if so how?
Crankgrinder is offline  
Old August 18, 2011, 10:46 AM   #2
WIL TERRY
Senior Member
 
Join Date: July 6, 2000
Location: BLACK HILLS
Posts: 1,084
WHAT load data shows this ??
WIL TERRY is offline  
Old August 18, 2011, 11:12 AM   #3
Unclenick
Staff
 
Join Date: March 4, 2005
Location: Ohio
Posts: 9,991
The 1 grain velocity/pressure factor is Richard Lee's concept, and he gives it in his book (at least, it's in the 2nd edition) for which he had the opportunity to measure it for some bullet and chambering and powder combinations. Obviously he didn't have the opportunity to do it for everything.

I don't know any other source of that number. You may be able to deduce it from published pressure and velocity data. I haven't paid close enough attention to it to try. I use QuickLOAD and a chronograph to get a good match between it and my components, then let it predict the pressures for load changes. Usually works pretty well.
__________________
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Patron Member
Unclenick is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:00 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2013 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06807 seconds with 9 queries