243 WIN - 115 DTAC load suggestions ?

Just wondering what is successful in the 243 Win with the 115 DTAC. I have a Bartlein 7.7 5R 28" barrel and have tried RL-25 at up to 48.2 grains with very little in the way of pressure signs (very slight bolt hesitation and NO ejector marking) and have settled back to 47.5 to 47.8. My hope of seeing 3100 fps does not seem doable though, best velocity with 48.2 was 3103, avg at about 3070 with SD's in the mid 20s not what I had hoped for. Any suggestions as alternatives or am I possibly working with a slow lot of RL-25?