Just another mould..or two.

[Kurt]

Jim,

Wads have a lot to do with holding the group together holding the vertical to a flat line. Holding that flat line then the oblique or horizontal is a problem the person behind the butplate has to correct with controlling the rifle.
As far as the wad in the primer pocket or over the flashole under the powder, I have had no results showing that it makes a difference.
It they work for other shooters fine business let them go for it. I won't argue the point with them.

The wad stack I have seen a large improvement holding the vertical down was with adding a 1/16" high density cork wad. This material is hard to find but it's a very fine ground cork that is a lot smaller than the pegboard stuff that you find a lot of the cork gasket is made of but you have to adjust the alloy temper using it because the bullet get a lot of protection from getting bumped up so it fills the grooves fully and fast. But this high density cork will expand fast sealing the gas from passing past it but it also needs a proper wad over the powder so it don't flex.
Those groups are some of the best I ever shot using my cork wad stacks developing a .44-100 load I was going to use at Raton one year I decided not to attend at the last minute. it started at home on my range at 135 yards and I finished at 200 yards at the range for the last test and it held together just fine, but I never took it to the gong matches to finish the longer range testing.

The thing shooting fine 5 shot groups like this is, it's tough to do this on call when ever you shoot or even do it again in the future.
It's one of the good day things. When ever you have a sub MOA at any distance your having a good day.

Kurt