The 6.8 is a 30 gr. case, for which 2200 is about ideal. The 1680 is a couple steps faster, and more suited to the .277 Wolverine, a 25 gr. case. Both require use of a mag primer for good ignition. In the larger 6.8 case you aren't generating enough gas volume to properly cycle the action. You may also have a gas port that is slightly oversize. Check with Harrison at ARP for the proper port size. It could also be a combination of all of the above. You need to troubleshoot the problem one thing at a time. Aside from measuring the port diameter, the easiest thing is to get some 2200 powder and try a 28.5 charge of that under the 110 gr. sparked by a #41 primer, that gives a pressure of about 58k per Western. Proceed from there.I have been having reloading issues using the standard weight measurements from the Hornady book. They either stick and not complete the cycle or FTE.
I used the Nosler 110gr spitizer and based all of my load data on the Hornady V max 110 with a start load of 22.5 I used Accurate 1680 but it doesn’t complete the cycle.
The ladder goes to 25.7. I looked at the Western powder laid it says start at 22.4 and it’s ladder tops at 24.9, with a max pressure of 58,018 psi.
Which load data should I use and for my 6.8 SPC just to maintain the right gas pressure to allow the gun to complete a cycle using this reload data.