I found that my Kimber 84L Classic has a tight chamber and a short throat/lead. I started out .050 off the lands with the Barnes 110 TTSX and Hunter ( from my previous work with it in another .270) No good ( 1 1/2 to 1 3/4) so I seated the bullet to the top edge of the first groove ( as many suggest) and 62.5gr Hunter/Nosler cases do 1/2"! I then started the Barnes 129 LRX .070 off the lands, over R16. I could do no better than 1 1/2, even later when I also seated it to the top edge of the first groove. So I left R16 and went to the old Standys, H4350/H4831sc. Bingo! 55.3/H4350/RWS cases BR2 was 1/2", and shot exactly 1" higher than my 110 TTSX, same zero. H4831sc/60.5/RWS cases/BR2 also went into 1/2" and also 1" higher than the 110TTSX and 1/2 inch right. So both work swell! I will chrono them al later on. I go for accuracy first, and then see how fast its going. I'm sure I'm plenty fast, ha.