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noylj · July 16, 2010, 02:44 AM

One of the first things one should learn when reloading is the the COL is gun/barrel/magazine dependent. I pull the barrel and drop a dummy round in. If loading for multiple guns, pull their barrels and check the dummy round in each one. Just as max load is gun/barrel dependent, so it COL. The only "rule" I have is to keep the COL as long as possible and still have firm seating of the bullet and a finished round that feeds and chambers freely.
As Ramshot states in their loading manual:
It is important to note that the SAAMI “COL” values are for the firearms and ammunition manufacturers industry and must
be seen as a guideline only.
The individual reloader is free to adjust this dimension to suit their particular firearm-component-weapon combination.
This parameter is determined by various dimensions such as 1) magazine length (space), 2) freebore-lead dimensions of
the barrel, 3) ogive or profile of the projectile and 4) position of cannelure or crimp groove.

July 16, 2010, 02:44 AM	#6
noylj Senior Member Join Date: October 22, 2007 Location: Between CA and NM Posts: 860	COL or COaL One of the first things one should learn when reloading is the the COL is gun/barrel/magazine dependent. I pull the barrel and drop a dummy round in. If loading for multiple guns, pull their barrels and check the dummy round in each one. Just as max load is gun/barrel dependent, so it COL. The only "rule" I have is to keep the COL as long as possible and still have firm seating of the bullet and a finished round that feeds and chambers freely. As Ramshot states in their loading manual: It is important to note that the SAAMI “COL” values are for the firearms and ammunition manufacturers industry and must be seen as a guideline only. The individual reloader is free to adjust this dimension to suit their particular firearm-component-weapon combination. This parameter is determined by various dimensions such as 1) magazine length (space), 2) freebore-lead dimensions of the barrel, 3) ogive or profile of the projectile and 4) position of cannelure or crimp groove.