What do you mean that your OAL is correct? Numbers and bullets would help.
Are you using the SAAMI max of 3.340? If so, don't, that number means little to nothing for the handloader.
This is from Weatern Powders Load data.
SPECIAL NOTE ON CARTRIDGE OVERALL LENGTH “COL”
It is important to note that the SAAMI “COL” values are for the firearms and ammunition manufacturers industry and must be seen as a
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.
Go here to learn how to set up your seating dies for YOUR rifles OAL.