Go Back  HuntingNet.com Forums > Firearms Forum > Reloading
Inconsistant C.O.L.'s >

Inconsistant C.O.L.'s

Reloading Share techniques for reloading, where to get the hottest in reloading equipment and learn how to reload from fellow hunters.

Inconsistant C.O.L.'s

Old 11-30-2013, 07:42 PM
  #1  
Fork Horn
Thread Starter
 
Join Date: Mar 2007
Posts: 386
Default Inconsistant C.O.L.'s

RCBS press, steel dies, pretty standard stuff. Reloading .308, 25-06 mostly. I've noticed for a while now that when all other things are identical (bullet, brass trim length, loads, seating depth, etc) my cartridges come out of the press at slightly different C.O.L.'s. Varies as much as .005 - .008". Kind of frustrating when you go to so much trouble to make each round exactly the same to maximize accuracy.
Any idea what I might be doing wrong? I occasionally clean dies with brake cleaner and a brush.
dig4gold is offline  
Old 11-30-2013, 07:49 PM
  #2  
Nontypical Buck
 
Join Date: Feb 2003
Location: Eastern wv
Posts: 2,775
Default

its the bullets
RR
Ridge Runner is offline  
Old 11-30-2013, 08:46 PM
  #3  
Nontypical Buck
 
Big Z's Avatar
 
Join Date: Sep 2009
Location: West NE
Posts: 1,455
Default

Keep on loading away. Measure from the ogive and you'll see more consistent numbers.
Big Z is offline  
Old 12-01-2013, 01:40 AM
  #4  
Giant Nontypical
 
Join Date: Oct 2013
Posts: 8,134
Default

Originally Posted by Ridge Runner View Post
its the bullets
RR
This could very well be it. You didn't say which bullets you use, but bullets with exposed lead tips can get flattened on the tips pretty easily just by the jostling they get during shipping. Take a box and carefully measure the overall length of each bullet and you'll see some variation. For what it is worth, the weights can and will vary slightly too. Anything made by mass production methods has an acceptable amount of variance built into the acceptable benchmark for that particular product.

This is why the folks that shoot for competition go to the trouble of measuring and weighing every bullet before they load them. In that world everything has to be exact. The question is, are you loading for competition or for hunting. If the answer is hunting and the reloads still group well, no problem.

If you measure all the bullets and they are all exactly alike, all the cases are exactly alike etc... and you still have this problem then something is slipping in your dies. Make sure the set ring for the die is in place and it can't move. I actually super glue the set screw in the ring after I get it how I want to help prevent this. Bad thing about that is it is very hard to make adjustments later so you need to be sure it is right. Because I shoot different bullets in my 7mm Mag I've got 3 different sets of dies, each set to a particular load. With the cost of components these days, buying a new set of dies is cheaper that coming up with a new load.
flags is offline  
Old 12-01-2013, 04:13 AM
  #5  
Typical Buck
 
Join Date: Feb 2007
Posts: 538
Default

When I first started I noticed the same thing. Then I bought this:

http://www.midwayusa.com/product/231...with-6-inserts
Wayspr is offline  
Old 12-01-2013, 05:47 AM
  #6  
Nontypical Buck
 
Join Date: Aug 2007
Location: WY
Posts: 2,054
Default

Originally Posted by Big Z View Post
Measure from the ogive and you'll see more consistent numbers.
In terms of accuracy, consistency in this measurement will have more impact than COAL will. You'll need something like the Comparator already linked.
homers brother is offline  
Old 12-01-2013, 08:30 AM
  #7  
Fork Horn
Thread Starter
 
Join Date: Mar 2007
Posts: 386
Default

Makes perfectly good sense to me. I'm gettin' a set!
As far as bullets . . . I didn't mention them because they all came up with the same results. From hollow point, soft point, or ballistic tips, all the calibers did the same. Even handgun. Just did some 9mm and saw the same results. Thanks all.
dig4gold is offline  
Old 12-01-2013, 05:57 PM
  #8  
Boone & Crockett
 
bronko22000's Avatar
 
Join Date: Jan 2004
Location: Eastern PA
Posts: 12,019
Default

I agree with the above. But I also saw a reloading tip either on "the gun nuts" or "shooting USA" that when you seat your bullet, lower the ram of the press slightly and rotate the case about 180* and seat again. This may give you a more consistent seat and also better bullet alignment.
bronko22000 is offline  
Old 12-01-2013, 06:12 PM
  #9  
Nontypical Buck
 
Join Date: Feb 2003
Location: Eastern wv
Posts: 2,775
Default

Originally Posted by bronko22000 View Post
I agree with the above. But I also saw a reloading tip either on "the gun nuts" or "shooting USA" that when you seat your bullet, lower the ram of the press slightly and rotate the case about 180* and seat again. This may give you a more consistent seat and also better bullet alignment.
that will help runout, but won't change varying ogives in individual bullets.
RR
Ridge Runner is offline  

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
Trackbacks are On
Pingbacks are On
Refbacks are Off


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.