Garth wrote:At least 5 diff types ammo and my loads 140gn projectiles 40gn 2209 or 35 2208. It's 6.5cm. Very clean I always clean with solvent for copper fouling it's got a vortex viper scope. I can fix most things this has me baffled. Ps crown seem ok
Have you measured the velocity of your loads and compared them to Hornady Factory Loads. Not sure if it's still the case but I did read that Hornady was using 41.7gr of AR2209 with their 140gr Bullets. I also have read that in the beginning they had trouble with blown primers as their loads were a bit too hot. Also read that some that liked the hot loads switched to Lapua Small Primer Cases so they could load hot without problems. I wonder if you have tried increasing your powder weights a tad.
I don't have a 6.5 Creedmoor so I can't give you specific help with that calibre. Had a neighbour drop in here with his Son about a week or so ago with his brand new Tikka in 6.5 Creedmoor to sight it in using my bench and gear. Factory loads (didn't take notice of the brand) and it was shooting around 1/2 MOA doing well under 1" at 200 yards.
I do have a 6.5x47 Lapua, actually 3 of them. I know that AR2209 does not perform well with a 140gr Bullet compared to using 130gr Bullets with AR2208 (37.6gr for a velocity of about 2,900fps) but it is a smaller case and I do know that accuracy / velocity wise it's very close to the Creedmoor. Since all three are used for target all bullets are jammed like 0.020" but with little neck tension it's more like called soft seating as the bullet is pushed back into the case on bolt closure. I have tested a lot with seating depth even back to a 0.120" jump but none were very accurate at all no matter which type of bullet but mostly VLD's.
I wouldn't give up just yet. I'd try a few more ideas like increasing powder load, jam to jump bullets and even changing primers. If possible I'd try changing the neck tension as well.
Hope you find some better results. I thought of getting a 6.5mm Creedmoor purely for the reason of entering Factory Class Target and knowing it is supposed to be a very accurate calibre.
All my testing is done on a very sturdy bench with a front joystick rest and quality benchrest rear bag.