OpticsTalk by SWFA, Inc. Homepage SWFA     SampleList.com
Forum Home Forum Home > Firearms, Bows, and Ammunition > Reloading & Ballistics
  New Posts New Posts RSS Feed - hornady loads..
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Visit the SWFA.com site to check out our current specials.

hornady loads..

 Post Reply Post Reply
Author
Message
bobaldoo View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: June/06/2011
Location: alberta canada
Status: Offline
Points: 72
Post Options Post Options   Thanks (0) Thanks(0)   Quote bobaldoo Quote  Post ReplyReply Direct Link To This Post Topic: hornady loads..
    Posted: June/02/2012 at 23:02
in hornadys 8th edition it states that when making loads for a 300 win mag the reloader should stick to near max load do to a thing called S.E.E (secondary explosive effect)...does this mean you should stay away from the lower loads that are posted in their book or anything lower than what is on the page...to a new reloader this is confusing especially when you've been told to start 5 to 10% lower that the lowest load a work your way up checking the pressure as you go.....was also told useing a faster powder can remedy this but kinda unsure about either at this point......
"I can hear you, the rest of the world hears you and the people who knocked these building down will hear all of us soon."   g bush....
Back to Top
billyburl2 View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar

Joined: January/08/2009
Location: Cottonwood, AZ
Status: Offline
Points: 4015
Post Options Post Options   Thanks (0) Thanks(0)   Quote billyburl2 Quote  Post ReplyReply Direct Link To This Post Posted: June/03/2012 at 00:33
For the most part, the loads listed are safe. I would not go below the minimum charge listed, for the reasons listed. Buy a couple of other books and cross-reference, use information from your powder manufacture. There is also a lot of information available online.
If it is tourist season, why can't we shoot them?
Back to Top
helo18 View Drop Down
Optics Jedi Knight
Optics Jedi Knight
Avatar

Joined: December/02/2006
Location: Montana
Status: Offline
Points: 5620
Post Options Post Options   Thanks (0) Thanks(0)   Quote helo18 Quote  Post ReplyReply Direct Link To This Post Posted: June/03/2012 at 07:30
I wouldnt go below the lowest listed powder charge. I usually start below the max a couple grains and work up till i see pressure signs. Are you trying to find a reduced recoil load?
To be prepared for War is one of the most effectual means of preserving peace.

GEORGE WASHINGTON
Back to Top
pyro6999 View Drop Down
Optics Retard
Optics Retard
Avatar
OT TITAN

Joined: December/22/2006
Location: North Dakota
Status: Offline
Points: 22034
Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: June/03/2012 at 09:24
im guessing they are referring to a "hang fire" which in a magnum from what ive read over the years is very unpleasant to experience.
They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead"

343 we will never forget

God Bless Chris Ledoux
"good ride cowboy"
Back to Top
dsr View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: May/31/2007
Location: United States
Status: Offline
Points: 244
Post Options Post Options   Thanks (0) Thanks(0)   Quote dsr Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 09:44

No SEE is not a hang fire.  The story is a large magnum case with a slow burning powder where the charge only takes up part of the case volume.  The theory is when the primer is ignited the powder which is laying on the side of the case is ignited in the middle of the case sending a pressure wave forward to the base of bullet and backward to the case head.  The waves fronts are both within allowable limits but after reflecting back from the ends the wave fronts are additive when they meet in the center of the case and the resulting pressure then causes the weapon to explode.  It is important to note that NO Ballistics Laboratory(like Sierra, Hornady, Winchester, Remington, etc)  has ever duplicated  an SEE!   They say that because they have received many reports from reloaders  of reduced loads causing problems over the years.   The loads listed loads in the manual are safe to shoot just do not go below them.

Back to Top
Bigdaddy0381 View Drop Down
MODERATOR
MODERATOR
Avatar
Georgia peach

Joined: February/27/2007
Location: Georgia
Status: Offline
Points: 13682
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bigdaddy0381 Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 11:06
If the bullets didn't move I could "maybe" see this happening. When the bullets moves there is nothing "solid" to send the waves back. something always brakes at it weakest point. the bullet would be the weakest point. I'm not saying SEE is true or not. I just know I have a few loads with 80% case volume and have never had any trouble and those are max or better loads with lighter bullets and semi faster powders in a 300win mag.

P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.

Ecclesiastes 10:2
Back to Top
dsr View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: May/31/2007
Location: United States
Status: Offline
Points: 244
Post Options Post Options   Thanks (0) Thanks(0)   Quote dsr Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 11:12
The burning powder waves are MUCH faster than the bullet is traveling at that point. Even at the muzzle where the bullet is traveling between 2700~3100 ft/s the gas is traveling better than 5000 ft/s
Back to Top
SVT_Tactical View Drop Down
MODERATOR
MODERATOR
Avatar
Chief Sackscratch

Joined: December/17/2009
Location: NorthCackalacky
Status: Offline
Points: 31233
Post Options Post Options   Thanks (0) Thanks(0)   Quote SVT_Tactical Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 11:15
wonder why subsonic loads don't ever experience this? 
"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
Back to Top
Bigdaddy0381 View Drop Down
MODERATOR
MODERATOR
Avatar
Georgia peach

Joined: February/27/2007
Location: Georgia
Status: Offline
Points: 13682
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bigdaddy0381 Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 11:52
Beats me then. Use a filler

P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.

Ecclesiastes 10:2
Back to Top
Steelbenz View Drop Down
Optics Jedi Knight
Optics Jedi Knight
Avatar
ROLL TIDE ROLL

Joined: January/03/2006
Location: Heart of Dixie
Status: Offline
Points: 5153
Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelbenz Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 12:18
What Hornady is tell you is it's best to find and use the closest charge weight accuracy node to the listed max charge. The closer you are to 100% fill in the case the less likely hood of a problem.  And to address the faster powder issue... No, it would actually increase the chance due to the fact you would use less volume of powder not more in a faster burning powder.
"Don't argue with a fool! From a distance you can't really tell who's who!"
Back to Top
bobaldoo View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: June/06/2011
Location: alberta canada
Status: Offline
Points: 72
Post Options Post Options   Thanks (0) Thanks(0)   Quote bobaldoo Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 14:36
not really looking for a reduced load but more so the best load for my gun.. more than likely all of hornady loads listed are safe, but with S.E.E sometimes being an issue it is just smarter to stick with higher load density..from what i'v read they try to dublicate this in the lab and when every 500 gun would explode they stll had no idea what they did to cause it........thanks for all your input, much appreciated...
"I can hear you, the rest of the world hears you and the people who knocked these building down will hear all of us soon."   g bush....
Back to Top
dsr View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: May/31/2007
Location: United States
Status: Offline
Points: 244
Post Options Post Options   Thanks (0) Thanks(0)   Quote dsr Quote  Post ReplyReply Direct Link To This Post Posted: June/04/2012 at 15:49
Just to say again it has never occurred in a lab setting.
Back to Top
Stevey Ducks View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: December/03/2011
Status: Offline
Points: 266
Post Options Post Options   Thanks (0) Thanks(0)   Quote Stevey Ducks Quote  Post ReplyReply Direct Link To This Post Posted: July/21/2012 at 23:22
I have never seen any explosive or pressure spikes from using lower than normal or suggested loads of slow burning powders in large capacity cases but I have read much about it -- "splintered stocks", "blown away floor plates" and the like and apparently this is the SEE or secondary explosive effect.
Using greatly reduced amounts of slow burning powder such as 50 grains vs 75 grains of the same powder in a .300 Win mag is certain to give less than good results, enough so I would not want to try it.
 
I have read about this type of thing for years but have been not ready to test it out or have seen any valid documentation.
 
I try to fill the case up to 85% capacity plus of a suitable powder. If 85% plus capacity is excessive I load for a .308 Win and get about 90 % of the velocity with near 100% capacity. 
Back to Top
Alan Robertson View Drop Down
Optics Master
Optics Master
Avatar

Joined: October/31/2009
Location: Oklahoma
Status: Offline
Points: 1763
Post Options Post Options   Thanks (0) Thanks(0)   Quote Alan Robertson Quote  Post ReplyReply Direct Link To This Post Posted: August/23/2012 at 20:27
It's almost universally recommended to NOT reduce slow- burn rate powder charges much below max, especially in the .300 Winnie.

In similar vein, Trail Boss can turn a thumper into a tapper for that all- important rifle familiarization and practice which one might not do, otherwise. Tame that Firebird!

"Garg'n uair dhuisgear"
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.281 seconds.