No, and I didn't say that - I made the inclusive statement, not an exclusive one. Yaw is caused by insufficient stability, this can be due to imbalanced bullets, or insufficient spin, or both.

Poor quality bullets have more imbalanced imperfections than higher grade bullets. These imbalances will cause a bullet to yaw - period. More twist can help slow that down, so it happens farther down range.

Under-stabilized bullets, spinning too slowly, will also yaw, even high grade bullets.

My point was really to say the fools online who tout 1:7 as too fast for their bulk supply 55grn FMJ junk don't know of what they speak. Crap bullets are going to spool out down range no matter what.