How far is your Chrono from the muzzle? Did you use new brass? What size bushing are you using in your die?
The results you have posted for the 6.5BR in RE15 and H335 are similar to our peak results in new brass. Somewhere around 32.5gr of H335 our brass would "doughnut" at the bottom. We have noticed that the Amax is a faster bullet than the SMK (with respect to identical powder charges).
We see a major pressure change occur when we go the the second firing of the Lapua brass. The brass volume increases about .5gr (water) once it is once fired and the brass shows pressure signs with smaller charges (Primer craters and ejector / extractor marks). Any thoughts?
The varget load you posted recently seemed to have a boring speed (2590 - 2625ish) but proved to be stable (Once fired Lapua Brass). We completed one test so far and found that some where between 32.4 and 33gr of varget is accurate. I also noticed that the neck tension (.286 bushing) we are using is robbing 25-40 fps on the chrono which is why I am interested in your bushing size.
It seems that you are having good luck with H4895. Did the charges nearly overflow the shells?