The Firing Line Forums - View Single Post - Bullet & Lands Info Needed for .308 Reloads.

gearheadpyro · February 25, 2010, 10:06 PM

It sounds like this test is related to finding the maximum C.O.L. for your chamber. Either that or optimizing the C.O.L. for your load.

Finding the maximum C.O.L. is (IMHO) best done with the Hornady Overall Length tool and a modified case. This tool will provide the best, most consistent, and most easily measured results. Simply thread the modified case on the tool, then drop your chosen bullet into the case. Remove the bolt from your gun. Push the case/tool/bullet combo into your chamber, then push the rod in until you feel the bullet stop. That is your C.O.L.

Optimizing C.O.L. is done in a similar manner to optimizing your charge. I wrote about my method on the load development page on my website.

Hope that helps.

February 25, 2010, 10:06 PM	#3
gearheadpyro Senior Member Join Date: September 3, 2009 Location: Charleston, SC Posts: 169	It sounds like this test is related to finding the maximum C.O.L. for your chamber. Either that or optimizing the C.O.L. for your load. Finding the maximum C.O.L. is (IMHO) best done with the Hornady Overall Length tool and a modified case. This tool will provide the best, most consistent, and most easily measured results. Simply thread the modified case on the tool, then drop your chosen bullet into the case. Remove the bolt from your gun. Push the case/tool/bullet combo into your chamber, then push the rod in until you feel the bullet stop. That is your C.O.L. Optimizing C.O.L. is done in a similar manner to optimizing your charge. I wrote about my method on the load development page on my website. Hope that helps.