6.5 Creedmoor Issues

I’ve been mainly loading 6.5 bullets for a Tikka 260 CTR. I picked up a Tikka 6.5 cm for the wife to use when not using her 7-08. Both guns have been easy to load for. Throw between 41 and 43 grains of H4350 behind any 140 grain bullet and they shoot pretty much sub moa all day long.
I was able to get the 130 accubond to shoot .3 groups out of the 260. I’m trying my best to get the 129 long range accubond to shoot out of the creedmoor. Only one grain difference in the bullet but 2 inch groups at best. I’d bought a few hundred of these for 6.5 Grendel which I had problems with also. has anyone tried a different powder on the lr accubonds. I’m at wits end on these. I’ve seated longer, shorter. Ran powder charges in .5 increments from minimum to maximum. I think they would make a great hunting round in this rifle if I can ever get them to work. Going to try some Alliant powder for a change but I’m not holding my breath.

So far with all these Tikkas they have preferred a jump to the lands. I started out short and worked up long enough to have to single feed. Shorter book data length done better for me. I’m out of the 130 accubonds to try but I’m thinking the ogive was fatter closer to the tip of the bullet verses the long range bullet. I ordered a bunch of Nosler ammo yesterday from Midway before their sale ends. I’ll check the accuracy of the 130 accubond to see if it does any different. Not giving up on the others yet. Chasing a good load sometimes takes a lot of bullets and powder. From chronograph readings all my sds are nowhere near as stable as the other bullets. I’ve ran some straight 140 ballistic tips that will stay in single digits. These are far from it. I’m thinking I may have to change powders and up the velocity on these. Even at Nosler max data primers were good and no sticky bolts. I’ve got an 8 twist. My Grendel AR has a 9 twist and I finally got 1.5 inch groups out of it finding one powder out of four that would do it. I’m still thinking the 8 twist should be sufficient for it.

I’ve got some Reloader 17 and 19. That and imr 4350 was my next try. Curious of range you shot accubonds at and damage they done. I hit one with a 7-08 this year with a 120 Barnes ttsx bullet I’d reloaded at about 85 yards. Got one lung and heart but had a 120 yard run with him. Left lots of blood but not much exit wound at all. Hoping the accubonds do better. Ordered up a bunch for the 7s also.

Horsey300, I use a lot of 4451 but it’s dedicated to a 300wsm. I never thought of using it in a cm. If I’m not mistaken I think the burn rate is real close to 4350.

I’ll have to try some. In the 6.5 I need all the velocity I can get as long as accuracy doesn’t suffer. Buying it used and the barrel as clean as it was I’ve no idea if it had any use or no use. I sent the action off today so about 10-14 days before I get it back with a decent trigger. I’m going to load up some with the 4451 until the 130s get here.