Lol I was out all afternoon picking up another cheap civic to fix up and drive (the reason I can afford expensive air rifles?!

) and I miss this!! Vertical stringing and making 2 groups...my .177 TX200 does this often, drives me absolutely crazy lol, and I also don't know what it is either?! Do you know the twist rate of you SubMoa barrel btw
@Billm...probably the pellet barrel? As far as your slug groups, yes that is still waaayyy better than the factory Brk slow twist. My

can almost 1-hole slugs @ 10Y and will be all over at 70/80Y, I was hitting different 5.5inch AV paper targets that I wasn't aiming for both left and right, up and down

. Speeds were fine and Mrds tightened right up, 100% the barrel.