I've got a Weatherby 30-378 Accumark and am shooting a 180 Barnes TSX. I came up with some loads using Retumbo powder based upon Hogdon's website that shows a 113grn max for a 180gr bullet. The load that worked great for me was 110grn of Retumbo that averaged 3415fps. I then checked Barnes website and they show the max to be 105gr of Retumbo. I haven't had any over-pressure signs like sticky bolt or flattened primer, but if I look very, very closely I can see an ever so slight ejector mark. Half the time I cannot even see it unless the light is just right. I also checked Weatherby's website and they show their factory ammo with the Barnes 180 going 3420 at the muzzle. Soooo..I'm thinking I'm okay with this load, but I want to make sure. Opinions?