Originally Posted by gotcha
With a new bbl bullets will tend to stick to the lands & pull out of the case slightly on extraction. Take at least five readings. Ten would be better. If your measurements vary more than .003" bullets are probabley sticking. Run a wet patch into the bbl & try again. If after five measurements you get 3 or 4 that are within .001" go with the shortest measurement. If you end up using more than one bullet, sort for length as base to ogive measurements can vary widely even w/ SMK's........... You'll also need to re-check seating depth from time to time as the throat will lengthen based on the number of rounds fired. Just my 2 pesos :)