Well I got them at Eders, but funny thing is I just looked them up, and the 400's are now $47.xx. So I pulled up my e-mail invoice and they were $43. Timing is everything I guess. There may be better deals out there, but I wanted another Pac-tab and they have them. Not everyone caries that tab so for me the price was right and I could get the shafts and tab in one order.
They are standard 5/16". I use my brass inserts in my GT's and ICS's.
I shoot about 54-55@29 1/4" with 400's @ 31 with 245 on the front.