Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

MAXIMUM C.O.L vs Optimal C.O.L

 
LinkBack Thread Tools Display Modes
  #1  
Old 06-04-2011, 06:45 PM
Junior Member
 
Join Date: Dec 2010
Posts: 16
MAXIMUM C.O.L vs Optimal C.O.L

I'll do my best to articulate the struggle I've been dealing with and trying to wrap my head around:

In the Hornandy loading manual (& I'm sure others) there is a printed MAX COL which say for a .300 WM is 3.340 - should be straight forward except when one comes across many others saying that a good place to start for accuracy's sake is .020 off the lands.

IF I put together a cartridge like this using the OAL Gauge my COL is .114" LONGER than the MAXIMUM stated in the manual. I'm given to the fact that factories have safety factors that MUST come into play so no biggie there...please clarify for me where the "public safety/manufacturing" elements end and where the real world veteran reloader REALLY begins.

BTW, I'm reloading for a Savage mountain rifle, have checked to see that the initially loaded cartridges DO fit into the magizine.

Disclaimer: I know that there are conservative and radical loaders out there so please clarify your basic position. As for me, I'm a risk taker and stay in bounds, but generally push limits...some call it a personality flaw...I call it fun

Thanks a ton,

Shane
Reply With Quote
  #2  
Old 06-04-2011, 08:33 PM
Gold Member
 
Join Date: Mar 2008
Location: clearfield county , Pa
Posts: 626
Re: MAXIMUM C.O.L vs Optimal C.O.L

factory ammo is built to SAAMI specs .factory firearms are chambered to SAAMI specs . SAAMI specs ammo will fit anything chambered in that cartridge . this is where handloading comes into play . a handloader custom builds his ammo to work best in his rifle . if your rifle shoots best with a .020 bullet jump then by all means load to that spec . being this ammo will only ever be fired in your rifle it is perfectly safe . just be careful if you have a load on the hot side and start working the bullet closer to the rifling . it can or will increase your pressure as you get close or jammed . so back off the powder a little seat the bullet longer and work the powder back up . a lot of guys start working up loads with the bullet jammed then work their way to jumping . Jim

do you know how to find the max COAL for your rifle ?
Reply With Quote
  #3  
Old 06-04-2011, 09:19 PM
Platinum Member
 
Join Date: Jul 2004
Location: Texas
Posts: 5,380
Re: MAXIMUM C.O.L vs Optimal C.O.L

+1
well said

J E CUSTOM
__________________
"PRESS ON"

Last edited by J E Custom; 06-04-2011 at 09:23 PM.
Reply With Quote
  #4  
Old 06-04-2011, 09:24 PM
Junior Member
 
Join Date: Dec 2010
Posts: 16
Re: MAXIMUM C.O.L vs Optimal C.O.L

I've been using the Hornandy OAL gauge to get that (my gun's MAX COAL). I've also been using a comparative method of placing a bullet in the dummy brass and working it down until it hits the jam length, measuring the scuff mark that the rifling makes then doing some math. They usually come out pretty close...the "scuff" method is a bit more crude, but like I said, it's been pretty close to the gauge.

Shane
Reply With Quote
  #5  
Old 06-04-2011, 09:36 PM
Junior Member
 
Join Date: Dec 2010
Posts: 16
Re: MAXIMUM C.O.L vs Optimal C.O.L

Note: I've also been coming at the project using the charge as the variable and leaving the jump length alone @ .030.

I've seen others leave the charge alone and go after the jump length first.

Any reason to reconsider my direction?

Shane
Reply With Quote
  #6  
Old 06-05-2011, 05:51 AM
Gold Member
 
Join Date: Mar 2008
Location: clearfield county , Pa
Posts: 626
Re: MAXIMUM C.O.L vs Optimal C.O.L

Quote:
Originally Posted by mshaner View Post
I've been using the Hornandy OAL gauge to get that (my gun's MAX COAL). I've also been using a comparative method of placing a bullet in the dummy brass and working it down until it hits the jam length, measuring the scuff mark that the rifling makes then doing some math. They usually come out pretty close...the "scuff" method is a bit more crude, but like I said, it's been pretty close to the gauge.

Shane


you're going to get a bunch of different ways to do this , most will be right , there is more than one way to skin this cat . I like to use a brass case that was fired in this rifle . do not resize it . I pinch the neck a little by hand , usually I push the neck against the edge of my loading table to get a flat spot or two . take a bullet that you are wanting to load , and color it with a black sharpie marker . just start the bullet into the brass case by hand leaving it very long . load it in the rifle and close and lock the bolt . then eject the brass case . sometimes the bullet comes out , other times I push it out with a cleaning rod because it stuck in the rifling . the sharpie marker will be scuffed from the brass case neck . put the bullet and case together to the scuff mark and measure it . this is zero , no jump , no jam . do this a few times to double check your measurement .
Reply With Quote
  #7  
Old 06-05-2011, 06:02 AM
Gold Member
 
Join Date: Mar 2008
Location: clearfield county , Pa
Posts: 626
Re: MAXIMUM C.O.L vs Optimal C.O.L

Quote:
Originally Posted by mshaner View Post
Note: I've also been coming at the project using the charge as the variable and leaving the jump length alone @ .030.

I've seen others leave the charge alone and go after the jump length first.

Any reason to reconsider my direction?

Shane


all of my rifles are repeaters and I load to feed out of my magazine . usually the magazine is shorter than the rifles chamber . so I load to my max magazine length varying the powder charges . when I find my best powder load , then I'll start to shorten my COAL to see if things get better .

with you starting at a .030 jump you can move COAL in either direction . you can leave that at .030 vary your powder then go back and change the COAL both longer and shorter to fine tune . or you could start with a mid range powder charge and play with COAL first , then play with powder charge to fine tune . here again there are many ways to skin this cat .
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: MAXIMUM C.O.L vs Optimal C.O.L
Thread Thread Starter Forum Replies Last Post
Optimal AR barrel length ranger mac Long Range Hunting & Shooting 3 11-12-2009 12:15 PM
Optimal neck tension for hunting Kris C Reloading 23 05-26-2009 01:22 AM
Optimal barrel length for a 7-08 youngtrout Rifles, Bullets, Barrels and Ballistics 6 11-21-2007 08:33 PM
Optimal Barrel Length victor Rifles, Bullets, Barrels and Ballistics 17 03-31-2006 05:24 AM
optimal barrel length for 6.5mm-08 (260 rem)? steve_77 Rifles, Bullets, Barrels and Ballistics 3 11-10-2004 05:38 PM

Current Poll
Spot & Stalk or Ambush For Western Deer?
MOSTLY - Spot & Stalk - 73.65%
1,006 Vote
MOSTLY - Ambush - 26.35%
360 Votes
Total Votes: 1,366
You may not vote on this poll.

All times are GMT -5. The time now is 08:08 PM.


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