Has anyone tried the .338 250 grain hornady match bullet at .675 BC. I got in a big order of bullets yesterday in all calibers and these looked really good. Also the 208 grain .30 caliber A-Max looked really good also at .648 BC. Any input on any of these. Also the 162 A-Max looked good in 7mm but on the box says 1-8 twist. I have shot 175 grain bullets with slower twists. I don't think it needs a 1-8. Any input on this.