Their 260 reamer is good to go. Mine is a couple of years old, but jeffbird has a newer 260. You shouldn't have any problem reaching the lands with any and all high BC bullets. The mag box in these rifles is quite generous. That's another appeal of the rifle...
Using a Stoney Point/Hornady comparator with an inner diameter of 0.253", base of the shell to ogive contact with the lands is 2.270". The mag box is 3.125", so the magazine can accommodate 0.855" maximum length of nose in front of the ogive to still to able to load into the magazine. This is based off of measurements on Barnes 100 grain TTSX.
