Shooting the 6.5 CM and 270 WSM
#1
Shooting the 6.5 CM and 270 WSM
Today was some more load testing with the 6.5 CM and 270 WSM. I first did a ladder test with charges from 40.0 gr to 42.6 gr of H4350. I got a nice node between 42.0 and 42.6 gr. The single target below is my aiming point at 100 yards to shoot through my chrony. I wasn't really concentrating all that hard on these shots as they were various charges and only checking velocities but still all 9 shots grouped into 0.9"! Velocities ran from 2472 up to 2618 fps. I had some additional rounds loaded with 41 gr and 42 gr and shot them off at the other target at 200 yards. One 5 shot group and one 3 shot group with the 41 gr measured 1.13" and .87" respectfully and one 5 shot and one 3 shot group of the 42 gr came in at .85" and 1.0". These groups correspond to my ladder test. I'm almost positive it will shoot tighter with a charge of 42.5 gr. At this point I consider this rifle a true 1/2 MOA rifle.
The 270 WSM on the other had didn't fare out so well. Three loads of 73 gr, 74 gr and 75 gr of MagPro shot 3 shot groups of 3.2", 3.5" and 2.6" at 200 yards. Even though the 75 gr shot the best today I was getting some pressure signs via a sticky bolt and a ring around the case head from the bolt face. My previous outing this rifle shot 1" with a 72 gr charge. So I'll stick with that. It will be good enough for hunting around home here.
The 270 WSM on the other had didn't fare out so well. Three loads of 73 gr, 74 gr and 75 gr of MagPro shot 3 shot groups of 3.2", 3.5" and 2.6" at 200 yards. Even though the 75 gr shot the best today I was getting some pressure signs via a sticky bolt and a ring around the case head from the bolt face. My previous outing this rifle shot 1" with a 72 gr charge. So I'll stick with that. It will be good enough for hunting around home here.
Last edited by bronko22000; 10-12-2019 at 01:31 PM.