The Firing Line Forums

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

Reply
 
Thread Tools
Old June 10, 2012, 03:03 PM   #1
c.read
Junior Member
 
Join Date: June 5, 2012
Posts: 12
I don't Know

So I went to the range today it was very windy! First things first I have a 300 win mag and I can not shoot more than 3 rounds without barrel getting super hot. So I reloaded ammo here are the results. I shot 70.6, 72.8, and 74.5. It was windy but I thought 70.6 & 72.8 shot pretty close in accuracy. I am using 200 grain sierra match king and IMR 7828 for powder and 250 cci primers. I want to shot long range. Does any reloaders have a suggestion? i'm sorry the photos turned when I uploaded them the powder weight is wrote on the paper next to them.
Attached Images
File Type: jpg uploadfromtaptalk1339358175445.jpg (60.3 KB, 41 views)
File Type: jpg uploadfromtaptalk1339358190075.jpg (51.8 KB, 33 views)
File Type: jpg uploadfromtaptalk1339358205574.jpg (53.0 KB, 30 views)
c.read is offline  
Old June 10, 2012, 03:31 PM   #2
a7mmnut
Junior member
 
Join Date: February 27, 2009
Location: NC Foothills
Posts: 1,150
That's a tough question--there are lots of different things to do. Are you loading to the land, and varying your OAL to check for accuracy with each load? I.E.: load two rounds at 72 grs. and to 3.330" OAL, two more at 72 grs. and 3.335", and two at 72 grs. and 3.340", then switch to the same pattern using 73 grs., then more at 74 grs., etc. Always start with a lighter load for each component. My Sierra book list the accuracy load for that heavy bullet using 64.6 grs. of IMR 4350 at 2800 fps, and the hunting load using 72.1 grs. of RL22 at 2900 fps. H1000 is also good, as is H4831. It's all about the consistency of the burn. Lotsa luck.

-7-
a7mmnut is offline  
Old June 10, 2012, 03:36 PM   #3
Jimro
Senior Member
 
Join Date: October 18, 2006
Posts: 5,773
The vertical stringing looks like you are getting velocity variations. Not a good sign for long range accuracy. A quick look at Hogdon's data shows 76 grains compressed under a 200gr partition, so I think you could increase the powder charge a little and see if that vertical stringing settles down.

Jimro
__________________
"Gorsh" said Goofy as secondary explosions racked the beaten zone, "Did I do that?"

http://randomthoughtsandguns.blogspot.com/
Jimro is online now  
Old June 11, 2012, 09:17 PM   #4
c.read
Junior Member
 
Join Date: June 5, 2012
Posts: 12
While I am reloading my oal varies plus or minus .002 is that going to make a big difference in my accuracy? I want to keep my shot group within a inch or two group. It comes down to I want to beable to hit a human size target 550 yards away.
c.read is offline  
Old June 12, 2012, 08:53 AM   #5
Brian Pfleuger
Staff
 
Join Date: June 25, 2008
Location: Central, Southern NY, USA
Posts: 18,791
You're still well below max charge, keep going, you may find a better load.

.002 variance in OAL is not your problem.

Your charge increases are too large too. You should be around 1% of max charge, tops. That would be .8gr at most. You are more than double that.

Check here... http://optimalchargeweight.embarqspace.com/
__________________
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  
Reply

Thread Tools

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 07:25 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06900 seconds with 10 queries