I was in a bit of a rush and couldn't take my chronograph along. But I did get some interesting results. First load was 70 grains of 2f Goex crushed so hard that I had to almost bang on my press with a hammer. It's not a big press, just a small RCBS that I've had for 30 years or so. I put in a .030 wad, .090 lube disc, .060 wad and buried the 535 grain post-ell bullet to cover all lube rings. I put 7 out of ten of these inside two and one quarter inches at 100 yards. (two five shot strings with a cleaning between the two.
I also had good results with 510 paper patched bullets using 60 grains 2f. The powder was lightly compressed and I used the same wads and lube disk as described above.
I believe that in my 34" barrel, a lube disk does work to improve accuracy. I haven't used a blow tube yet, I am trying to avoid that task. It does appear that lube, or the lack of it in long barreled rifles, does make a bigger difference than powder compression.
One other problem that I found out about. - I was not inserting the case expander all the way into the case believing that insertion of only and inch or so was sufficient. I kept tearing paper patches and trimming lead off the side of bullets. When I went to load the 510 pp bullets, I discovered my mistake. I am hoping that is why I had some fliers with the post-ell bullets as I loaded them prior to discovering the error and scraped lead.
To answer a question asked in 2nd trip, I use a Buffalo Arms powder compressor. Not trying to advertise, but prices, inventory, and service is pretty darn good.
C F