I have read with interest those threads about the 300 Varminter for several reasons and I think in Richard's case that round works very well for a specific task. When most think 'varminting', they think of prairie poodles and hundreds of rounds a day. In Richard's case, he is a groundhog enthusiast. I've gone to Ohio several times to shoot groundhogs and typically I got 15-30 shots in a day. Frankly I enjoy it much more than prairie dog hunting as it is a whole different game. Lots of glassing, scouting, walking, etc... It's a very enjoyable 'hunt'. Prairie dogs are fun too, but driving up to a town and setting up benches or bipods and slinging hundreds of rounds from a couple positions to me is not as enjoyable as spending some time with a good friend in the scattered woodlots and fields of hill country in Ohio. In that situation, I can imagine the impact of a 110gr bullet at such velocities (actually I think I saw it on some of Richard's videos) and the trajectory should be spectacular and well suited to the task.
I have Richards pillar bedding and rebarelling videos and respect him as a quality smith that knows what he is doing and am happy he personally didn't get bashed over this.