The chambers in the Encore and TC Contender are no different than other chambers. I have two Encore Rifle barrels and two 15" barrels in the following calibers and I neck size.
Rifle= 7mm TCU
Rifle= 243
Pistol 308 Win
Pistol 7mm BR
I also have over 10 TC Contender barrels and I neck size for all of them, except for straight walled cases.
However, if I continuously fire maximum loads constantly, I have had to full length size the 7mm TCU brass to assure easy closing of the gun.
I don't shoot Maximum loads. I have been neck sizing for decades to avoid the time with brass cleaning after FL sizing.
I even load my rifle loadings on a Dillon 650 progressive loader with a neck sizer only.