Firearm & Gun Forum - FireArmsTalk.com

Firearm & Gun Forum - FireArmsTalk.com (http://www.firearmstalk.com/forums/)
-   Ammunition & Reloading (http://www.firearmstalk.com/forums/f30/)
-   -   Lets hear some techniques for finding c.o.a.l (http://www.firearmstalk.com/forums/f30/lets-hear-some-techniques-finding-c-o-l-73276/)

dustinoif3 09-27-2012 02:36 PM

Lets hear some techniques for finding c.o.a.l
 
I've heard several different ways. One using a dowl rod to the face of the bolt, put a mark then drop a bullet into the chamber while using a dowl to push the bullet to the lands then insert dowl down barrel to tip of bullet. Sounds feasible. Problem is the ogive of bullet. I guess if your using the same brand of bullet they will be pretty close. I've heard of the dummy bullet and sharpie trick. Them just breaking down and getting the chamber gauge and comparoterand bullet comparator

dustinoif3 09-27-2012 03:14 PM

I was trying to add till my phone jacked up that I'm loading for my Remi 700 .308. Also opinions on full length resizing or neck sizing for bolt guns. Thx in advance

locutus 09-27-2012 03:48 PM

I like neck siZing for bolt guns. Just my personal preference, I can't prove it's better.

An easy way to find a useablw COAL is to put a factory rounf of the same bullet weight in the seating die, and slowly turn the seater stem down until the seater touches.

A good Sinclair measuring tool is better, but the factory round works pretty well.

dustinoif3 09-27-2012 04:40 PM

Yeah that's the technique I use for my pistol loads. I'm looking to find the lands so I can work back to find the sweet spot

The_Kid 09-27-2012 05:11 PM

I neck size only in all of my bottleneck cartridges; lengthens the case life.

I seat all my bullets to the cannelure, or, (if no cannelure,) I seat them close to, (if not at,) the suggested length in my reloading manual.

Works for me... today's shot;

The_Kid 09-27-2012 05:22 PM

Quote:

Originally Posted by dustinoif3 (Post 956514)
...I'm looking to find the lands...

I partially neck size a case as to snugly hold a bullet from gravity but can be pushed in easily. Insert a bullet so it sticks out a good deal. Chamber that round then eject it as to not let it fall; measure the COL. Repeat the chambering process as to make sure that length is correct.

dustinoif3 09-27-2012 05:58 PM

I've heard of that method. Seems pretty fool proof. Someone told me to that I should full length size new brass or brass that came from a different rifle. Then once it's fired from your rifle and has expanded to the chamber to neck size from there on out. That method for bolt guns only. Seems to make sense for building a round just for your rifle.

steve4102 09-27-2012 09:36 PM

Quote:

Then once it's fired from your rifle and has expanded to the chamber to neck size from there on out. That method for bolt guns only. Seems to make sense for building a round just for your rifle.
True, but with each firing the brass case continues to grow, so the way the neck sized brass fits into the chamber will be different with each consecutive loading. As the brass continues to grow at some point you will have to FL size and bump the shoulder back. Depending on the rifle and the load that may come after only a couple firings or it may take many firings.

This is how Nosler recommends finding your specific OAL.

http://www.thefirearmsforum.com/showthread.php?t=97328&highlight=coal

Me, I use the Hornady/Stoney Point Gauge.

grandpabear 09-27-2012 10:38 PM

Quote:

Originally Posted by The_Kid (Post 956562)
I partially neck size a case as to snugly hold a bullet from gravity but can be pushed in easily. Insert a bullet so it sticks out a good deal. Chamber that round then eject it as to not let it fall; measure the COL. Repeat the chambering process as to make sure that length is correct.

That is exactly how I do It. A couple of times to verify and that method works better than any gauge you can buy. IMO After I get the measurement I shorten up by .030 and start working it.

dustinoif3 09-28-2012 12:03 AM

Awesome. I've heard that .010 is the closet you wanna be to the lands. Correct? So if I start at .030 and go in increments of 5 I should be tracking. Also has anyone ran into not being able to use the magazine when loaded out farther than manual col?


All times are GMT. The time now is 06:48 PM.

Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.