My model 70 257 Roberts likes RL26 with 115gr Nosler Partitions I got 3133 FPS, Win case CCI 250 primers 2.800 OAL.
RL23 with 110gr Accubonds 3123 FPS Win case. CCI250 primer 2 .820 OAL.
RL17 110 gr Accubonds WLR primer Win case 2.800 OAL 3151 FPS.
RL23 115 gr Nosler Partition CCI 250 primer 3129 FPS.
Norma MRP 117gr BT Hornady CCI 250 primer 2.850 OAL 3068 FPS.
With the heavier bullets MRP has been most accurate followed by RL23.
What length barrel do you have?
