Thread: 6.5 Creedmoor Loads for 1:8 Twist?

Steelisreal - out of interest, why did you stick at 41.5 gr and what velocity did you get from that?

@Flyblown - I loaded up 3 rounds each from 38 to 42 grains in 0.5 grain increments a few weeks back when my rifle was brand new. All the loads grouped well, but the 41.5 shot in to one large hole. I figured that apart from tweaking seating depth that it was pretty good so I should just stop right there.

I haven't shot it over a chronograph as yet - that will have to wait for some friendly sort to let me fire a few rounds over/through it, or a couple of paydays time!

Have been having good success with the 135 bergers and 147 eld-m with reloader 26. getting great accuracy at good velocity, 2850 for the 135s and 2800 for the 147s. lapua brass 22 inch barrel

Originally Posted by Steelisreal

@Flyblown - I loaded up 3 rounds each from 38 to 42 grains in 0.5 grain increments a few weeks back when my rifle was brand new. All the loads grouped well, but the 41.5 shot in to one large hole. I figured that apart from tweaking seating depth that it was pretty good so I should just stop right there.

I haven't shot it over a chronograph as yet - that will have to wait for some friendly sort to let me fire a few rounds over/through it, or a couple of paydays time!

Thanks mate. Will be very interested to see what your speeds are.

With my Creedmoor I ended up in a silly situation of being driven upwards in the AR2209 powder weights by a chrono that is under reading by 80-100fps. No pressure signs at any stage and the brass is fine after 4 firings now, and man it is a killing machine.

I wanted a steady 2700fps from my 143gr ELD-X and I passed the powder weight for that speed about 80-90fps low according to the chrono. So I carried on, having spent some time on the Creedmoor forum looking at what others were doing and asking questions. Ended up at 2720fps, three 15-20mm groups at 100m from 42.4gr AR2209, which is 0.9gr over the Hornady book max. A lot of the issues I was reading about identifed a velocity deficit in H4350 (AR2209), blokes just not getting what they wanted compared to the book scale, so that kind of fooled me a bit. Also, this from Johnny’s Reloading Bench which is always helpful...

https://youtu.be/r0gQCmnYmHU

Anyway I went out back and drop tested it and its like nah, somethings wrong, groups at 300m were well high compared to Strelock and Hornady ballistics. Calculated velocity based on average drop was 2800fps exactly. Set this as default, went out and shot bang on target at 300m and 500m on paper. Hmm, so much for the chrono. First pest control trip dropped 22 goats between 286 and 625m. One miss in 23 shots, I’ll take that.

Next reload of this Lapua small primer brass I’m gonna drop the load to book max and see what we get accuracy wise, over a new chrono (good blokes at Broncos will sort it out). Want to prolong brass life, it ain’t cheap.

Interestingly at the start of the ladder (about 2550fps) I got a genuine one hole 3-shot group, 10mm at 100m, the best group I’ve ever had in any rifle ever. So to see if it was a fluke I made up 6 more rounds at that weight and did it again, twice... thought holy shit maybe I should just stop right there.