I was out shooting rabbits (and some paper targets afterwards) yesterday. It was crisp at -2 but a very enjoyable sunny afternoon. After I managed a couple of rabbits (there were not many around) I set up a couple of targets at 100 meters for some plinking fun. Shooting went well, I am still getting to know my CZ after I have put about 300 rounds through it. One thing I noticed is that there was a bit of smoke (remaining from the shot just fired) coming from the moderator after I closed the bolt for another shot. So I started blowing lightly down the chamber before I chambered a new round, and lo and behold plenty of smoke came out the front. Now, I did not notice any difference on accuracy depending on whether I 'de smoked' the barrel or not, but it got me thinking. Should the presence of quite a bit of smoke in the barrel from the previous shot not alter the ballistics and/or the trajectory of the next shot? I guess if there is smoke in the barrel already, the compression is different, or this is the theory. Am I missing something?