Barrel twist rate for 125gr bullets and and less

[Twitch24]

First time post long time guest. Here is what I have done and I do hope that I did not make a mistake. I have ordered from MGM a 1 in 9 twist custom select barrel in a 21 inch tamper for a G2 Contender. I do not have any plans to shoot any bullets over 125 grains and will most likely stick with the 123 gr. SST if the set-up works for the particular bullet and barrel. I plan on hunting whitetail deer with this set-up. Will the 1 in 9 twist work with what I am looking to do???? I have purchased so far the 120 gr Ballistic Tip, Hornady 123 gr and the Barnes 100 gr TTSX in 100 gr. Information and opinions would be greatly appreciated. Thanks Twitch24