No Problem with regards to shot count with the longer model, I have never counted but I would have guessed at over 90.
If it is only being used for FT I can't see the pont in paying the extra for the 100 you will have to either remove the mag between lanes or get a single shot adapter, much easier to just put the pellet into the barrel also there are no bells ad whistles on the 100 except it has a Walnut stock the 101 comes with a Beech stock.
HW 77 V glide kit by Steve Pope
8-40x56 Custom Shop.
HW 101. Big Nikko. Ginb FT Stock.
Webley Omega, Gas Ram.
Rohm Twinmaster Trainer.
Red Dot Sight.