RE: 130 xlc 300ultra
The fouling seems to depend on fast you are driving them and the smoothness of the barrel. At speeds above 3500 fps, all the regular X and XLC bullets seem to have terrible fouling in any barrel. I haven't shot any TSX bullets yet, but I'm hoping they will be better. I have a box of 85 gr. 6MM TSX in the reloading room right now waiting to be tested in the 6MM-284. This should be a good test, as I normally get about 3700 out of this bullet weight in that caliber.