Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

Barrel length and powder burn rates?

 
LinkBack Thread Tools Display Modes
  #8  
Old 05-30-2009, 12:17 PM
Silver Member
 
Join Date: Dec 2008
Location: SW Idaho
Posts: 193
Re: Barrel length and powder burn rates?

Thanks AJ.

It's looking like I need to choose whether to stay with H-1000 and keep the 26" barrel or go shorter and get a different powder (maybe H4350 as you suggest).

The idea of shortening my barrel was to make it a bit more packable while hunting but also I've read that it will stiffen the barrel a bit and could improve accuracy. I know the downside is loss of some velocity, but I thought it may be worth it to gain some precision. It's a factory barrel.
Reply With Quote
  #9  
Old 05-30-2009, 12:21 PM
Platinum Member
 
Join Date: Oct 2005
Location: Michigan
Posts: 2,232
Re: Barrel length and powder burn rates?

Quote:
Originally Posted by bookworm View Post
Here is a bit of info from Hodgdon on the Chuck Hawks site:

.300 Win. Mag.

I know this is straying off topic a bit, but still related...Any thoughts on what a "reasonable" chamber pressure is for the 300WM rem 700?

62,366psi is the current standard max pressure for the 300 Win Mag. I know that guys run it in the high 60's in some rifles though.

I believe that 54000CUP is the old standard CUP for the 300WM.


AJ
__________________
If some is good and more is better, then too much is just right.


My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
Reply With Quote
  #10  
Old 05-30-2009, 09:36 PM
Platinum Member
 
Join Date: Aug 2005
Location: Murray, Ky.
Posts: 1,269
Re: Barrel length and powder burn rates?

Hey, this may not help at all but I reload for a buddy of mine. He has a 300 win mag in sf2 and I load 82 gr. of h-1000 behind a 168 smk not the hottest load but shoots ragged holes at 100yds. Haven't had a chance to stretch it out yet been too wet here to get out in the fields.

Nathan
Reply With Quote
  #11  
Old 05-30-2009, 10:32 PM
Silver Member
 
Join Date: Dec 2008
Location: SW Idaho
Posts: 193
Re: Barrel length and powder burn rates?

Hi Nathan - actually it is helpful to me.

Do you happen to know the barrel length of your buddies rifle?
Reply With Quote
  #12  
Old 05-31-2009, 05:24 PM
Silver Member
 
Join Date: Jan 2006
Posts: 239
Re: Barrel length and powder burn rates?

Either slow powder or fast powder , all powders burn within the first 2" of the barrel.

Longer barrel provide a longer pressure time for either powders.

Slow powders work just fine in a shorter barrel.
Reply With Quote
  #13  
Old 05-31-2009, 05:46 PM
Platinum Member
 
Join Date: Oct 2005
Location: Michigan
Posts: 2,232
Re: Barrel length and powder burn rates?

Quote:
Originally Posted by su37 View Post
Either slow powder or fast powder , all powders burn within the first 2" of the barrel.

Longer barrel provide a longer pressure time for either powders.

Slow powders work just fine in a shorter barrel.
Absolutely not true, if they burned in the first 2", then why would you see fire out the end of a 20" barrel with slow powder?

Or find powder granules unburnt when using too light a bullet in too short a barrel with too slow of a powder?

Quickload does a great job of showing how much powder is burned and at when during the bullet's travel.


AJ
__________________
If some is good and more is better, then too much is just right.


My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives

Last edited by AJ Peacock; 05-31-2009 at 05:49 PM.
Reply With Quote
  #14  
Old 05-31-2009, 10:29 PM
Silver Member
 
Join Date: Jan 2006
Posts: 239
Re: Barrel length and powder burn rates?

"Absolutely not true, if they burned in the first 2", then why would you see fire out the end of a 20" barrel with slow powder?"

Your seeing gases re-ignite when they leave the barrel and hit oxygen.


ALL POWDERS BURN WITHIN THE FIRST TWO INCHES OF BARREL LENGTH AND NO MORE!

If you think that slow powders burn all the way down a long barrel you are mistaken.

Quick Load shows us slow powders that create a different pressure curve than faster powders.

Longer barrels create longer pressure times.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Barrel length and powder burn rates?
Thread Thread Starter Forum Replies Last Post
how long does the powder burn? davewilson General Discussion 11 01-28-2009 01:49 PM
Smokeless rifle propellants burn rates lever-hed Reloading 3 01-09-2009 08:15 PM
.308 barrel length and twist rates? csarms Rifles, Bullets, Barrels and Ballistics 1 02-05-2008 11:25 PM
burn rates rotorhead Reloading 4 05-08-2007 07:17 AM
powder burn rate Jody Reloading 5 09-23-2006 07:21 AM

Current Poll
I currently have hunting preference points in the following states

All times are GMT -5. The time now is 05:12 PM.


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