Yes, it may be part of it, but when I called TC to ask them about this they told me that the guns were made for sabots. I told them I live in a state that sabots can't be used, and he sounded like he didn't know any state was like that. Duh?
Some of the reports that I read were from guys who sounded like they put a good effort into trying to get a load to work. We know the QLA is off center on some guns. that's been shown in pictures. Do your guns have that? If yours are straight you aren't going to have a problem.
Funny that the junk Bergaras are always straight, and the high quality TC's aren't. Oops!