I have an '05 sidekick(same barrel,shorter receiver)and
have shot many,many loads of 105 grns. of loose T7 with
300 grn. bullets with absolutely no signs of a problem.
You should be fine with the loads you want to shoot.105
is the max load I've gotten to shoot good groups out of
mine,so no need for me to go higher.I do use PR's 25 acp
plug in mine.
Gary