Thread: 7mm-08 reloads extraction issue - thoughts please

Loading for a friend, caliber I don't shoot myself.

Rifle is a Ruger American, low round count. Brass is once fired factory.
FL sized.

Ist batch was loaded with 139gn Hdy Interlock over 43.0gn 2208..Very accurate tight groups, no issues.

2nd batch is 139gn HDY SST over 43.0gn 2208 so same charge, different projectile, same brass, FL sized.

Shooting the first of these at range today they are just as accurate, no issues chambering. Shot a group of 3 and 3rd case would not extract. No issue with bolt lift, just could not pull it back. Tried again after about 3 min and it extracted easily. I then shot my rifle, we went up and checked/patched the target, came back to 100m mound and went again..same thing happened, 2 cases extracted fine, 3rd jammed tight, came free after a few minutes. Left rifle same amount of time, about 20min, shot 3 factory rounds he had, no issue.

So what is going on?

43.5gn is.max load. I'm thinking of dropping to 43.2 or 43.0 but there are no other pressure signs. No heavy bolt lift, primers are normal, no extractor mark on head..

Thoughts please?