280 AI and Retumbo

[eyeguy]

In my 26 inch christiansen arms with a little over max book of retumbo I am getting 2940 fps with fed 210 primers. I do have the 175 elite hunters past normal coal cant recall measurement at this time. new nosler brass handles 62 gr without trouble but after about 3 loadings gotta back it off a bit for practice still shoots very nearly same point of impact out to 400 ish

 

[DC125]

Ran some more Retumbo. Changed brass to Peterson and worked back up but now it is a compressed load. Got consistent results with 5 shot groups at 2750 fps gettting me .5 MOA. Not seeing any pressure signs. Standard deviation was from 21 to 10.

Bought some N560 to try out and it is moving the 175 Elites pretty good. Was able to get to max in my barrel and pushing them along at 2950 fps and an SD of 5.6. Standard deviation was much better with the VihtaVuori but will need to adjust seating depth to see if I can do better than .75 MOA.

Have a bottle of Staball 6.5 but will chase down these two.