Thanks for the reply Sir Feenix.
My rifles are plain-Jane .270 Winchesters; so the data you kindly provided for your AI version wouldn't quite work. However, I too have had good results with H4831SC, in some guns, and better luck with H4350 in others. They all shoot Sierra bullets well. Congrats on your results with .75 MOA at over 900 yards. Very nice.
I've heard good things about the long-for-caliber Matrix Canadian bullets, but I've also read they're not available in the US anymore. I've not checked recently though, so that could be out-dated information. Where do you source them?
Berger took the plunge, bless 'em, and is making their "Extreme Outer Limit" Elite Hunter bullet at 170 grains. It's a beauty, but I've not even tried to shoot them in a 1:10 barrel. I also like the looks of the Nosler 150 ABLR, but have read mixed results on terminal performance.
The percentage of .270 owners who are interested in and willing to re-barrel to a faster twist is likely pretty small . . . which I suppose explains the market's general hesitancy to design and market longer, heavier, high-BC pills in .277 diameter. I'm completely invested and satisfied with the .270 Winchester cartridge, after hunting for so many years with it in various rifles. The easy fix for long range, I suppose, would be to go with a .280 / .280 AI for the much-better bullet selection. Not for me though.
Funny how you can get a LOT of heavy bullets for the .264 diameter, but again that's driven by the common availability of 1:8 barrels.
Fingers crossed that Sierra will make available a high-BC .277 Game Changer sometime soon. Something in the 165 - 175 range would be terrific.
Happy hunting Sir!
SF -
Brad