ORIGINAL: stubblejumper
There is one thing not mentioned yet. On your Encore there is a gap between your barrel and breechface. This distance is usually betwee .001 to .005. Therefore your Fired Encore brass will be longer, even if both chambers were exactly the same(which is normally not true).
All rifles are built with headspace.In the case of the encore,the gap is part of the headspace,so the fired brass from the encore will not necessarily be longer.
All rifles are built with headspace??-What does that mean?? Are you saying all rifle's have a gap?? How large of a gap?? Not IMO.
I try to size my brass so there is little to no gap between the shoulder and the chambering. Definitely no more than .001 to .002. This space is one of the reason's a Savage rifle shoots so well. Normally what a gunsmith can do is chamber a case in a Savage rifle, turn the barrel in until the chamber touches the shoulder(until the bolt is tight), then tighten the barrel nut-this normally backs the barrel off .001 to .002. That is why it is easy to switch barrels on a Savage.
Sorry but you are wrong about that. The brass on almost all encore's when fired is longer than brass fired in most bolt actions. This is due to the gap in most all Encore's between the end of the barrel and the breech face. This is in addition to the cut chambering. This difference does not exist in a bolt action. Do not take my word for it(as I am sure you will not), ask the experts. Bellm, or EABCO, or MGM-these guy's will explain the same thing to you. This gap is why it is hard to get the headspace right, and the sizing of your brass right unless you know the actual gap(again, you do not have this problem with bolt's). Tom.