OAL question on custom chamber

[Buckoman]

My 260Rem chamber was cut using a custom reamer that has .080 freebore. Now is .080 the total length of the chamber to the lands starting from the neck? Or is there a bit more space after the freebore to the lands. Can I use this as a way to calculate total OAL on a loaded round using the O-give on a loaded round? IF so how?

thanks,

 

[MitchAlsup]

Re: OAL question on custom chamber

Why calculate, just measure--more accurate and easier.

Take a sized unprimed unpowdered case and seat the bullet you are going to use very long (3.000 in 308). Then with extreme care chamber and extract said round and then measure both ogive and OAL. Do this about 3 times for best accuracy.

 

[MALLARD]

Re: OAL question on custom chamber

+1 mitch , measure it.