Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

H4350 Burn Rate Change?

 
LinkBack Thread Tools Display Modes
  #8  
Old 09-18-2013, 10:37 PM
Bronze Member
 
Join Date: May 2011
Posts: 53
Re: H4350 Burn Rate Change?

Quote:
Originally Posted by bullfrog View Post
I have switched lots of H4350 with all other components identical with identical powder charge and blew primers. Had to pull the other bullets. I now back off and work up every time I change powder lots.
I've had the same experience. I now try to buy H4350 at least 16lbs at a time (2 8lb in the same lot).
Reply With Quote
  #9  
Old 09-18-2013, 11:04 PM
Silver Member
 
Join Date: Jan 2013
Location: Maple Valley, Washington
Posts: 456
Re: H4350 Burn Rate Change?

aggie99

The velocity change you got while dropping 1 grain of powder is pretty normal. I just cracked the seal on a new 8 lb jug of H4831SC and had to add 2 grains to get back the lost velocity. I canít think of a lot change Iíve made where there wasnít a change in burn rate.
Reply With Quote
  #10  
Old 09-21-2013, 03:46 AM
Bronze Member
 
Join Date: Sep 2013
Location: NE PA
Posts: 35
Re: H4350 Burn Rate Change?

When loading H4350 in the 30-06 with a 168gr bullet I have found:

With a 22" barrel I get the highest velocities with a 57.0gr load and slight lower velocity from a 58.0gr load.

From a 26" barrel the numbers are more what I would expect, I get the highest velocities from the 58.0gr load and slightly lower velocities from the 57.0gr load.

Accuracy with all 4 loads is very good.
__________________
Freedom Is Never Free
Proud member of the NRA
Reply With Quote
  #11  
Old 09-21-2013, 07:14 AM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,268
Re: H4350 Burn Rate Change?

ArchAngelCD
A 30-06 packs a slug of powder behind the bullets, which isn't burned at all in a short barrel until released at the muzzle.
This contributes to increased recoil, ES, reduced accuracy(compared to better designs), and as you found, adding more powder beyond burn reduces velocity -with a 30-06(not with most cartridges).
Reply With Quote
  #12  
Old 09-21-2013, 11:32 AM
Silver Member
 
Join Date: Sep 2008
Posts: 147
Re: H4350 Burn Rate Change?

Thanks too all for the food for thought. I am trying to find a second cronograph to check my results but since I am not seeing any pressure signs I think the load will be safe in my gun.
Reply With Quote
  #13  
Old 09-21-2013, 10:06 PM
Platinum Member
 
Join Date: May 2012
Location: N.D.
Posts: 2,945
Re: H4350 Burn Rate Change?

All I can say is WOW. I usually buy rl in 5# bottles, but I've been buying rl25 in #ers lately as the 5# jugs are higher per pound. I haven't noticed a bit of difference even with stuff that was packaged a couple of years apart. I don't buy enough H to know any better I guess, though it seems when I do buy it I'll but a 8#keg (to keep from getting ripped off locally) so I don't really have multiple lots to deal with.
Reply With Quote
  #14  
Old 09-23-2013, 10:31 PM
Silver Member
 
Join Date: Sep 2008
Posts: 237
Re: H4350 Burn Rate Change?

58 grains of H4350 seems pretty consistent in my 06...24" barrel...2,862 fps average for 7 shots. ES was 18, SD was 7...and this was with Winchester brass.

2,873
2,861
2,861
2,873
2,855
2,861
2,855
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Current Poll
Do you archery hunt for elk?
YES - 32.50%
78 Votes
NO - 50.42%
121 Votes
Not yet, but I plan to. - 17.08%
41 Votes
Total Votes: 240
You may not vote on this poll.

All times are GMT -5. The time now is 11:59 AM.


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