Thread: 6.5-284 loads

6.5x284 has the case capacity for slower powders. I was using Ar2225 for the Berger 140 EH and 56.5 gr gave me 2950 from a 24". Iv since switched to RL 23 and in lapua brass 53.5gr at 3000 fps is giving great accuracy and very good brass life with both the 140 EH and the 143 ELDX. RL 26 is supposed to be very good but apparently a little more temp sensitive than RL23.
You should be able to get to 2900 with your 20" barrel ok.