It looks to me that your node at 43.4 is very similar to my tac with 140 Bergers. If your happy with that speed I would do some loads from say 43.3 to 43.7 in 0.1 g increments and see if you have minimal speed increase and pick the mid range of the node. I would suggest also to try a different primer as my experience is that Fed match or Muroms will give more consistent results. I run mine around the 2650 mark and have no issues. Others may say you need more speed but mine are good to a 1000yds without going faster. To go faster you’d need something else than RS62 as it’s about at its limits where you are.