As has been said the Triple Deuce, with its 1:14" twist [early BSA's & Sako's had 1:16" twist] was designed & made for 50-53 grain bullets.
The original .223 [.222 Remington Special] was designed for a heavier 55 gr. FMJ bullet, & was originally chambered in barrels with the same 1:14" twist as the .222, but shortly thereafter, the bullet was changed to a BT design for longer range stability. This required a 1:12" twist. Fast forward a decade or so and the 55 gr. bullet was changed to a 62 gr. [SS109] bullet which required an even faster twist of 1:9". For use with C78 tracers, an even faster 1:7" twist is required, hence the change to barrels with a 1:7" twist.
It is a pet peeve of mine hearing people say that "a .223 is a .223 is a .223".
NO, they are NOT!
A .223 with a 1:14" or 1:12" twist is a completely different animal than a .223 with a 1:7" - 1-8" twist.
One is meant as a target / 250 yd. varmint cartridge.
The other is meant as a long range 600-1,000 yd. target / & shorter range deer cartridge.
Try shooting a .223 90 gr. VLD bullet in a .223 with a 1:14" twist & see what happens. Alternatively, try shooting a 52 gr. HPFB bullet in front of a MAX! load in a 1:7" twist .223 & see what happens.
I believe that that is the 1 instance where we should follow CIP rules, just as in the case with the 6mm BR Remington - 6mm Norma BR. Although the cartridge case for both is the same, because of different twist rates and different chamber leades, the cartridges are completely different, therefore requiring different names, which is EXACTLY the case with the different .223 chambers/twist rates.
Rant ends!
