Even with a bunch of ####ty bulk federal 55gr my initial testing was at worst 2MOA, so reports of 4-5" groups seems excessive to me ....
55gr and the 1 in 8" WK barrel twist do not get along as far as I am concerned.
Here is a 5 shot group of Hornady 68gr Match HPBT and 24 grains of Varget - 100 yards
Note also that the squares are .96" rather than 1". Must be how the printer scales my LGS target sheets he gives away when you buy stuff......
Bench rest, sand bags.
Note I have not run this load through my radar yet - I was going for group size first.