The 1:9 twist generally likes the 69 grain bullets with a slower powder such as AA2520 so 4895 would be worth a try with a goal of about 2700 fps.

I shoot a 1:7.8 and it likes the 77's and 80's with the slower powders. It also likes the 52's and 53's but with a faster powder like IMR 4198. I've shot the 53's using 4198 with excellent results.

So, you might try the 55's with 4198.