I use the same loads in fireforming as I do otherwise.
When I got my Tubb 2K match rifle, I had to resize and fireform 22-250 to 6XC because cases were not available then. I used the exact load I used later after fireforming. I fireformed cases by shooting them in matches. There was no difference in accuracy or POI at 200 yards. I even shot them in a few 600 yard matches. However, they would not work smoothly through the magazine for some reason so I only used them for slow fire.
David Tubb's web site, incidentally, recommends heavier loads for fireforming than for matches.
Later, I had a 6.5x54mm with excess headspace. I fireformed those cases with my masimum hunting load. I used chamber compression, not bullets seated into the lands. Since I have to practice anyway, I fireformed and practiced at the same time.
So I consider fireforming without bullets, using bullseye or cream of wheat, as a waste of time and money.
