Welome to LongRangeHunting!
I'm of the opinion same as the other two gents. Leave it alone. 1-9 twist is great in the .223Rem., especially in a bolt action rifle. Sounds like you have been hanging out with the AR guys!
Sheesh! You are blessed to have a Remington with that twist, normally it's a lot slower (My one dislike for the Remington .22 centerfires).
That twist will stabilize the 69-70gn bullets perfectly. I had a Savage 110 FP (24") back in 2004 and it shot great. I dusted many a NC crow with that little rifle. I started shooting the Nosler J4's (Custom Competition now) and SMK's in 69gn. With 25.0gn of H4895, Rem 6.5, I shot .2's @ 3000fps from day one.
I tried the 55gn Nosler Ballistic Tip with 26.5gn of W748, Rem brass and Rem 6.5 primers. My best accuracy with this load was .136" at 100yds. Never did chrono it though.
As good as that little jewel shot, I traded it off to another LRH forum member. I love to trade firearms.
Have a good time with your .223 and those Carolina pines! Happy shooting. JohnnyK.