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Old August 4, 2011, 08:58 PM   #1
Join Date: February 26, 2011
Location: washington
Posts: 34
how important is C.O.L?

im new to reloading and some of my 308 winchester rounds are a little below what my reloading manual says for cartridge overall length. the COL is supposed to be 2.800 but one or two of mine are at 2.780 is this going to be a problem? also is a little too big bad also?
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Old August 4, 2011, 09:07 PM   #2
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No problem at all. It will increase the peak pressure slightly due to lower case capacity.

I am assuming that you are following proper practices and not starting at a max load. Realize that you could be using a different bullet than the load was developed with. Bullet lengths can vary between manufacturers for the same diameter and weight. So even if you loaded to the exact same COL, the seating depth could be different.
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Old August 4, 2011, 09:42 PM   #3
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Reducing OAL in a bottle necked rifle round will not increase pressure. In most instances it will reduce pressure.
From a few that know about this sort of thing.

Scroll down to "From the Lab"
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