Success

Put a linear compensator on the short barreled Ishapore and the extra weight on the end of the barrel had positive results. I tried 3 different loads and all had smaller groups than before. In fact one produced minute of angle. 

I also tried 5 different loads in the Swiss K31. Two loads gave me minute of angle, one with 180 grain bullet and the other 165 grain.

 Both had low power variable scout scopes mounted. If my eldest son was there, the groups would have been smaller. He can outshoot me with a rifle every time.

Next up is trying different 6.5 Grendel loads in the recently modified AR. The small case my make it more challenging.