the very small and barely there at all, pinch of cotton ball fiber if its used is simply there to keep the powder charge near the primer,
the fiber patch/circular wad is less than 1/16" thick in most cases and on firing is going to, be or should be in contact with the bullet base
,and follow the bullet like a gas check of sorts, yes in some cases its going to stick to the base of the projectile,
this has no negative effect on accuracy that Ive ever seen, wads may or may not help accuracy
minor changes in primers, powder charges and lube use can ALL individually have an effect on accuracy,
so take accurate notes on what DOES and DOES NOT work.
lets say your using 40 grains of imr 3031 and your not happy with accuracy
you may find swapping to a winchester or federal mag primer,
or to a standard non-magnum winchester or federal primer
or boosting or reducing the powder charge a few grains,
Ive had generally inconsistent accuracy with remington primers
cci and alcan work ok in most but not as well as winchester and federal in my experience.
a different over all cartridge length,or adding a wisp of cotton over the powder helps maintain accuracy
has a major effect on consistency or accuracy
different burn rates will effect the way the bullet grips the rifling and stabilizes
changes in powder charge and primer will effect accuracy.

btw imr 3031 being a faster burning powder than imr 4064 youll generally find the slower burn powder requires a heavier charge weight to build similar pressure and velocity
thus to get the bullet to seat in the rifling in a similar way, the charge of 4064 will generally be a bit higher to get similar accuracy,
if the 3031 is not accurate but the 4064 is you might find reducing the charge of 3031 helps, try boosting and reducing charges and changing primers youll be amazed at what minor changes tend too do to results


https://www.trackofthewolf.com/List/...70/1/WAD-430-A