Ok. Have finished load development. Here are the main bullets and thoughts for those it can help or interested.
Found two good loads each shooting better that I can. .25 to .35” three shot groups.
I’ll dig up some picks and post later.
Load 1 is H1000 with CCI LR Primer, 133 gr berger. 3180...
I don’t think smooth vs other matters as much as other mechanical aspects. I got into rifles later in life and started with a little Howa 308. It was a shooter. Have since owned REM 700, savage 110, Ruger 77, Browning, Fierce (sako inspired design) and Defiance. There is definitely a difference...
Same here. 3031 shoots great in my daughters 243 with 22” barrel. 4831 was also accurate but had a flame thrower flash due to slower burn and shorter barrel