The Firing Line Forums

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

Thread Tools Search this Thread
Old March 2, 2013, 04:12 AM   #1
Join Date: October 23, 2011
Posts: 75
Handloads louder than factory?

I was at the range the other day shooting my 7mm-08 and .223. Some of the folks around me asked what I was shooting and were surprised by my calibers because of the bang. I load both of them with Varget. Loads are a little above middle in the reloading books, and Quickload has them in the yellow, so I know these aren't hot loads So my question is do different powders give bigger or smaller "BOOMS" than another?
grisbald is offline  
Old March 2, 2013, 05:24 AM   #2
chris in va
Senior Member
Join Date: December 26, 2004
Location: Louisville KY
Posts: 13,534
I imagine it has to do with combustion rates. A slower powder may still be expanding past the muzzle.
chris in va is offline  
Old March 2, 2013, 07:13 AM   #3
Senior Member
Join Date: January 10, 2012
Posts: 3,504
Just to add, I have had people tell me my AR is really loud. I am not loading max loads. I use H335 powder and my AR is a 16" barrel. Could it be that H335 powder is still burning as the bullet is leaving the barrel ?
rebs is offline  
Old March 2, 2013, 08:00 AM   #4
Senior Member
Join Date: May 25, 1999
Location: Too close to Houston
Posts: 4,196
I imagine the powder is all burnt before the bullet is a foot down the bore. The supersonic cloud of expanding gas at the muzzle makes the bang.

I use H335 powder and my AR is a 16" barrel.
The 16" barrel has more to do with it than the powder, IMHO.
Proud member of the NRA and Texas State Rifle Association. Registered and active voter.
Sport45 is offline  
Old March 2, 2013, 08:46 AM   #5
Ted D
Join Date: January 27, 2013
Location: Dayton.Ohio
Posts: 76
Does that cause muzzel flashes as well?Not to change the subject
Ted D is offline  
Old March 2, 2013, 09:00 AM   #6
Senior Member
Join Date: April 23, 2006
Location: South Texas
Posts: 1,907
That plus the flash inhibitors that are a component of the powder. Many powders, military in particular, have grain coatings that surpress flash. I don't know what they are but i suspect graphite is involved.
hodaka is offline  
Old March 2, 2013, 11:13 AM   #7
Brian Pfleuger
Moderator Emeritus
Join Date: June 25, 2008
Location: Western Colorado, finally.
Posts: 19,118
Check the muzzle pressure values predicted by QL. The bullet's exit essentially uncorks a very high pressure bottle. The higher the pressure, the louder the "POP!" when the corks comes out, just like a wine bottle.

It effects the muzzle flash and can also effect accuracy too, because the bullet is directly effected by the muzzle blast.

It also has a dramatic effect on recoil. Use QL to find a powder with lower muzzle pressure and check it's recoil calculation, then check one with a much higher muzzle pressure but similar velocity.

One of my favorite features of QuickLoad is its ability to predict low muzzle pressure powders for short barrels.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
-The Architect
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.
Brian Pfleuger is offline  

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 11:38 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2017 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Contact Us
Page generated in 0.08187 seconds with 7 queries