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I reloaded 40 rounds of 243 shells keeping everything very uniform. I started with 38.5 gr. of IMR 4350 and going up to 42 gr. 5 bullets each at 1/2 gr. increments. Shooting all 100gr sierra game kings.
What just doesn't make any sense to me is the accuracy that I got. It was pretty bad at first but every load I put through it the group went up about an inch at 100 yards. I was getting like 3-5 inch groups and then at 40 gr. it dropped to about 1", stayed the same for 40-41 then 41.5 I got a about a 1/2" 5 shot group. I was hoping that the group would tighten up more with the 42.0 gr. which is the hottest load I made, but they spread out to about a 4 inch group again.
Everything I've heard or read says that the differences would be very subtle.
Does this make any sense to anyone?
Should I just work up another 10-15 at 41.5 and see if I get the same results?
What just doesn't make any sense to me is the accuracy that I got. It was pretty bad at first but every load I put through it the group went up about an inch at 100 yards. I was getting like 3-5 inch groups and then at 40 gr. it dropped to about 1", stayed the same for 40-41 then 41.5 I got a about a 1/2" 5 shot group. I was hoping that the group would tighten up more with the 42.0 gr. which is the hottest load I made, but they spread out to about a 4 inch group again.
Everything I've heard or read says that the differences would be very subtle.
Does this make any sense to anyone?
Should I just work up another 10-15 at 41.5 and see if I get the same results?