www.bullshop.gunloades.com
www.trackofthewolf.com
Wingbone
the Krb will have a bore of around .503.5 IMO a little large for PB IF I were you I would try the bull shop
Conicals DAN makes a super bullit , The BS conicals is what I shoot in my KRB
I shoot the NEX 460gr & the UC Shorts 443gr in a .504 diam. over 85gr 2fg loose 777 & win. t7 primers and you can get 400 conicals with shipping for around $113.00 I also use a over the powder wad in a .510a from track of the wolf ,1000 pcs $ 7.50 This load in my gun will print a cloverleaf at 100yds.