When I was doing my load work up with RL-17 and the 200 grain Nosler Partition, the closer I got to 55.0 grains of powder the tighter the group got.
This load was easy and fun doing.
This is the only load I use RL-17. Might be more in the future.
Have a good day.
Any idea or guess what pressures your load is running? I worked up to 55.0 gr RL-17 with 200 gr NPT and chronographed 2750 FPS. Normal (easy) extraction effort but the CCI 200 primers were flattened a bit more towards the edges. I will back off to ~2650 FPS since the groups were about the same at the lower velocity.
