charge question for 1-14 twist

[tpende]

just wondering since my gun has a very slow twist rate, do i have to load slightly hotter to get the bullet spinning fast enough to stay stable out to 500? its a .223 and i think the avg. bench load using 52 grain bullets is between 23.5-24.5 grains. im thinking around 25. any input is appreciated!

 

[kansasvet]

It is my understanding, I've never seen it proved, that a bullet loses almost no rpm during it's flight. So, theoretically, it should stay stable if it started with enough rpm to be stable.
However, it seems some bullets lose stability when they break to subsonic speed, most noted in 1000 yd. shooting.
All that noted, then if your bullet stays supersonic at 500 yds. and it started stable it should stay stable.
I personally would try a bullet heavier than 52 grs., perhaps a 60 gr. and an increase in velocity will give it greater rpm.

 

[marion packett]

Depending on the bullet, some 60 grainers will need faster twist, particularly in 223. Multiply vel. by 72, then divide by twist to get rpm. Compare rpms with, say a 22-250 to 223 and you will see why a 60 gr bullet may be stable in 22-250 and not in 223. For example, a 22-250 shooting 14 twist may have as much or almost as much rpms as the same bullet from a 223 with 12 twist.