Well saidI
I have no quarrels with 277 caliber. Will be happy to see it standardized for long heavies. I have shot 170 eol & 150 sst in my 10 twist 270. While it would shoot both of those moa or a little better, the 170 showed signs of being marginally stable down range. The best grouping bullets I have shot in a 10 twist 270 were usually 130 grains and were not finicky. 140s also shot well. 150 ssts weren't bad. But of all the shooting I've done across many Calibers & cartridges I have noticed how bullets of various length and weight react to twist. Sometimes I have been surprised at how a bullet that shouldn't be fully stabilized will shoot great and not be finicky. But more times than not, a bullet just groups tighter with the Ideal twist for its length & weight. It is more noticeable at greater distances. Doesn't matter what caliber, theres no magic caliber. I won't argue that sometimes you can get one to shoot great when it's on the lower end of stability because I have done it myself and that's great when it turns out that way. I just can't help but believe the 170 eol wouldn't be a lot less finicky in an 8 twist vs a 10.