Re: Loads for .260 /.243/ 6.5x47/6.5 Creedmoor
Back from the range, CM now makes me happy... The factory Hornady ammo was only getting me 2640fps, I've upped the powder charge a little, and now she's up around 2800 where it should be...
I used some 139 Scenars (thanks Mike!) and they seemed to do great.
I shot 2 5 shot groups of each loading. I suck at shooting groups, so take them with a grain of salt, but it told me what I needed to know.
Specs:
Rifle:
Badger Ordnance action, Bartlein 25" barrel with BO Thruster brake
Ammo:
New brass
Fed 210M primers
139 Lapua Scenars
H-4350 powder
COAL 2.815
<span style="font-weight: bold">First load:
</span>
I just threw 42.5 gr of powder with my Charge Master into unprepared, new brass, to make sure there were no pressure signs before I started laddering up. These 5 shots are on the top target marked "zero".
Ave Velocity: 2738
SD: 1
ES: 4
the rest of the loads had the full fussy monty done to them. Fully prepped brass, through the powder with the Charge Master, then checked it on my beam scale.
Low and behold, the first 5 I just threw and loaded had the best "numbers"...
<span style="font-weight: bold">Second load was 42.7 gr
</span>
Average Velocity: 2752
SD: 20
ES: 60
<span style="font-weight: bold">Third load was 42.9 gr
</span>
Average Velocity: 2773
SD: 14
ES: 51
<span style="font-weight: bold">Fourth load was 43.1 gr
</span>
Average Velocity: 2802
SD: 17
ES: 49
<span style="font-weight: bold">Fifth load was 43.3 gr
</span>
Average Velocity: 2807
SD: 24
ES: 67
<span style="font-weight: bold">Sixth load was 43.5 gr
</span>
Average Velocity: 2821
SD: 9
ES: 33
By the time I got to the last load I was done... I couldn't tell you if the group was really that bad, or if I just ass'd it all up...
Even at 43.5 there were no real pressure signs to be concerned about... Primers looked good, and only some very faint extractor marks on the case heads.
Target pics