andym79 wrote:Hi Straight shooter, thats nice to know, I figured 24 gns would be good!
Do they group well as close as 100 yards, as I wondered if with a 1:8 twist, if the bullet would go to sleep quickly enough to do well at 100 yards?
I know the 77smks are meant to be excellent and longer distances, I ask because I know the benchrest shooters do best with slow twist barrels and small bullets for tight groups at 100 and 200 yards!
The 77 grainers were designed for use in ar15 rifles for US high power style shooting which is shot up to a maximum range of 600 yards. The jacket profile allows for an overall length compatible with ar15 magazine feed without the excessive deep seating as is required with 80 grainers but still permit close engagement with the throat in a ar15.
Sierra match king bullets are lot tested and must hold 0.5" groups in the Sierra test barrel. If they don't then that lot is downgraded and sold as 'seconds'.
The only reason I have used 77 grainers is that I got a quantity at a good price. Normally 80 grain and 77 grain are about the same price so I would buy 80 grainers every time.
Don't go thinking that superficially imitating what benchresters do will necessarily deliver massive benefits or any benefit for that matter.
It's something along the lines of a car enthusiast thinking that since formula 1 cars put nitrogen in their tyres then if the enthusiast puts nitrogen in the tyres of his 85 Corolla it will handle like an F1 car. It ain't necessarily so.