Yes.177
With the 700 mm barrel, well the heavy barrel at least slugs worked damn fine ( 13 gr ) also in the STD liner, but unsure if i tried the 10 grainers in it, if i did probably regular 10 gr KO slugs and i can not recall result.
I do remember 10 gr Zan not working good for me.
But tore off the long barrels and DIY CF sleeve and went back to the original 600 mm with a new standard barrel CUZ not able to find any Heavy ones at the time.
The original 600 mm barrel, i would not even give that to the person i loathe the most, it did not work above SUB12 speed / power
Got maverick when it was brand new on market, and a little later the 700 mm barrels when they came out, and it have given me great joy shooting several 10.000 of slugs in the following years.
Im at a place where i might as well have a ammo subscription with Zan, just ordered 10 new boxes of 13 grain yesterday, i shoot 2-3-4 boxes in a day during summer, and often i shoot 2 consecutive days, and do that 2 times a week, so quite a lot of lead launched here.
Right now though i always grab my Epic Two, only think of the Maverick when i see it lying in its case on top of a big cardboard box in my living room, have lived here for like 14 years now and at least 1/2 of my stuff are not unpacked, haven’t even put up light here, i have screen light and a single floor lamp in a corner i use when i work on stuff on my living room table.