Just ran some R26 loads yesterday and they were too hot.
Lapua case 53 gr. R26 with 129gr NABLR federal 200 primers
Forbes rifle 24" barrel at 92 degreee temp.

First shot looked fine with 3,130 fps. Should have known that was too good to be true. By the third shot and with a warm barrel I was getting pretty flat primers. The 53 gr load had seemed fine with the 129 HBTSP and Winchester primers at 2,975 fps.

Suspect the heat, soft primers and long bearing surface of the Noslers are resulting in excess pressure. This combined with an overcharge too. Will drop back and switch primers and try again on another hot day. The Hornadays will be the fall back but I just wanted to see how the Noslers do at short to medium ranges on Deer.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli