After forgetting my ammo at home yesterday and no more time to run back I made it out today with all the required equipment to actually shoot!!! I'm shooting a Ruger American Predator in 6.5 Creedmoor with a 22" barrel. I was shocked at how long the throat is on these factory rifles. The magazine donest allow them to run that length unless you take a dremel to them
(which I did) I can now run a COAL of 2.920"
The loads I tried were all with RL-26, 147 ELD-M, and at a COAL of 2.895" which is .005" off.
The Temp was 35* and pressure 27.09 inHg
Here is what I turned out over the magnetospeed (one shot only for pressure)
46 2627
47 2681
48 2769 (Compressed)
49 2835 (primer cratered and hard bolt lift, Absolute max, Compressed Load)
I will probably back down to 47.5-48.0 grains.
I've had great luck with RL26 and the speeds in this cartridge with 140+ grain bullets since I can seat them out so far.
On another note I ran the 140 ELD-M with RL-26 and COAL of 2.875". This was also just to find max pressure with one shot each.
48 2763
49 2833
50 2887
There was still a little rattle of powder so I could put a bit more in just to see. The pressure wasn't bad even at the 50 grain load.
Still have to run the ballistics to see if I would gain anything in this cartridge running the 147 vs 140 ELD-Ms but just thought I'd put this out there.