RE: Over powder wad or cornmeal?
O most Deff. with out I had a good shot group but could not get them to tighten up better than 2.5 - 2.75"
with the wads I shoot a 1" to 1.25 shot group at 100yds . I shoot the BullShop Conicals in a .504 460gr NEX & 443gr UC Shorts with 85gr 2fg loose 777 & win T7 primers out of my KRB7. I think I was getting to much Blowby to keep a consistant Preshure behind the Bullets. Made a Big Differance.