I load a 200 gr. Rainier FP bullet and get a 1.235+/- in Winchester and PMC cases.  I load the same bullet in Remington and CBC and Federal cases and get an OAL of 1.240+/-.  Any explaination as to the differences?  Is it a difference in case length or is there something else going on?  It doesn't affect shooting or accuracy, I just can't figure out the reason for the added length.  Some folks on other forums seem to be concerned about such a difference, but I don't see it if the bullet isn't seated too deep.