Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

powder charge vs velocity

 
LinkBack Thread Tools Display Modes
  #8  
Old 05-22-2012, 06:24 PM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,169
Re: powder charge vs velocity

Bunch-o-baloney..
While a charge in excess of adequate barrel length get's anyone into diminished returns, there are still returns.

You should explore logical (and real) reasons for your observations.
Probably one or more of Richard's rational list.
I don't know what they are, but it isn't too much powder.
Reply With Quote
  #9  
Old 05-22-2012, 07:55 PM
BML BML is offline
Bronze Member
 
Join Date: Oct 2009
Posts: 97
Re: powder charge vs velocity

Thanks again for all the advice so far. I appreciate it.
Reply With Quote
  #10  
Old 05-22-2012, 09:10 PM
Silver Member
 
Join Date: Jan 2009
Posts: 451
Re: powder charge vs velocity

Quote:
Originally Posted by Mikecr View Post
Bunch-o-baloney..
While a charge in excess of adequate barrel length get's anyone into diminished returns, there are still returns.

You should explore logical (and real) reasons for your observations.
Probably one or more of Richard's rational list.
I don't know what they are, but it isn't too much powder.

You say baloney but don't know why it is or have a logical explanation for how to fix the problem yourself?? Hmmm sounds familiar, Obama is that you???
Reply With Quote
  #11  
Old 05-22-2012, 11:47 PM
Platinum Member
 
Join Date: Apr 2010
Location: Allen, TX
Posts: 2,608
Re: powder charge vs velocity

Quote:
Originally Posted by jsthntn247 View Post
You say baloney but don't know why it is or have a logical explanation for how to fix the problem yourself?? Hmmm sounds familiar, Obama is that you???
jsthntn247,

None of us know why because we weren't there and had no control over the variables and method of procedure. ...never mind the ability to gather enough samples to be meaningful.

Perhaps someone will explain why more powder results in reduced muzzle velocity rather than diminishing returns?

...unless you're dealing with compressed loads which affects containment and seating depth.

-- richard
Reply With Quote
  #12  
Old 05-23-2012, 06:57 AM
BML BML is offline
Bronze Member
 
Join Date: Oct 2009
Posts: 97
Re: powder charge vs velocity

Quote:
Originally Posted by rscott5028 View Post
jsthntn247,


Perhaps someone will explain why more powder results in reduced muzzle velocity rather than diminishing returns?

-- richard
That's the question I would like to know that answer to! They certainly were not compressed loads. I did a lot of testing with charges in the 48-48.5 grain range and never experienced any big variances in velocity like this.

Once the wind dies down up here I am going to test that same 50.5g and 51.0g again and see if I come up with the same results.
Reply With Quote
  #13  
Old 05-23-2012, 07:42 AM
Gold Member
 
Join Date: Jan 2012
Location: Hot Springs, South Dakota
Posts: 504
Re: powder charge vs velocity

Quote:
Originally Posted by rscott5028 View Post
there are many reasons why this can occur...
  • statistically insignificant sample size
  • variable lighting affecting chrony
  • bore condition, clean vs fouled
  • barrel temp, ambient temp, ammo temp, powder temp sensitivity
  • shooting position and inconsistent hold from shoulder fired weapon
  • brass volume consistency
  • seating depth
If you can't come up with anything logical, then see if you get repeatable results by alternating shots from each load. If after 30 samples each, the mean of one load is 2x SD apart, then you can have 95% confidence that the MV going forward will be about that much different.

Either way... how did the groups compare? How did POI compare?

-- richard
BML,

Richard has given you a few possibles. I would check them and anything else that may have missed, or that didn't stay constant. Anything as simple as a low battery in the chrony, chrony picking up a muzzle blast or shooting your reloads out of order. There was atleast one thing that was not working right or not constant in your reloads, chrony or methods.

Rule out as many things as possible (read "all) and reshoot to obtain correct data.
Reply With Quote
  #14  
Old 05-23-2012, 07:56 AM
Gold Member
 
Join Date: Jan 2009
Location: GSP, SC, USA
Posts: 612
Re: powder charge vs velocity

Try the chrony at the end of wire (15' < 20') be sure sun is shaded. Could be you were too close?
Good luck.
__________________
Son, The first shot is the important one - the others just make him run faster! Grandpa 1949
NRA Life Member 1970
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: powder charge vs velocity
Thread Thread Starter Forum Replies Last Post
7MM WSM velocity verses powder charge question. lisagrantb Reloading 4 10-11-2011 07:37 AM
Powder charge for 7mm Remington Magnum using 168 vld Gretagirl Reloading 11 12-09-2010 03:51 AM
300 RUM powder charge LReich Reloading 0 07-15-2009 01:30 PM
Light powder charge for .270 Blacktail Reloading 10 08-16-2007 08:33 PM
Powder Charge Jim Hundley Reloading 11 07-17-2006 10:11 PM

Current Poll
Do you wear hearing protection while hunting?

All times are GMT -5. The time now is 04:19 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC