Take a piece of brass same as that used previously. Insert it into the chamber to see if it chambers so you can easily close the rifle. If it doesn't then your brass needs further sizing and/or possibly trimmed? If it chambers ok then seat the bullet you used in previous round and load another to that length. Will that round seat easily, if not then you have too long overall length? Haven't had any issues with tight chamber on my Hornet or 223. In fact brass from a friends Ruger 77H will chamber easily so the Ruger has a tighter chamber than the TCR barrel which I was surprised.
