Factory "AA's" have been satisfactory for me, but prefer Remington
STS's, Federal papers and Gamebore Blue Diamonds. No problems with
Kent, Challenger or Fiocchi ... just prefer the results I get with the
what I do.
If the advertising is believable, STS has been the brand of choice at the Grand by a good margin for the last several years... about coincidental
with Winchester making the change.
For "Will I Am" .... Billy, "Winchester Ammunition" and "Winchester Firearms"
are seperate entities. ( i.e. different companies ... Winchester Ammunition
is not "now closed" ! )
With maybe 25,000 of the old-style AA's in 12 & 20, I'm still reloading
them to my heart's content, primarily with Winchester primers, Alliant "promo" and CB AA-replacement wads, but wouldn't hesitate to switch to either
Remington STS's or Federal GM plastic IF & when I run out. ( Have a couple of thousand GM's on hand I'm experimenting with ... no problems at all loading
them up on the PW with either Fed. or CB Fed. replacement wads.)
Last I'd heard, NASA had selected Winchester primers to fire their rocket equipment ... after testing competing brands for reliability. In those tests,
Winchester was the most reliable. Have also used Federal, Remington &
Cheddite primers. No issues with any of them ... except packaging. Winchesters are easier to handle in & out of the primer tray on both
the PW & MEC loaders. Best results with Federal GM rifle primers for all my
rifle reloading however.
Just my 2 cents worth !