#36748
Whirlibird
Whirlibird
Survivalist
member10

Newer? Most commercially avail 855 is new manufacture. Same for SS109.
Contract overruns, intentional or sccidental, as well as just making a wanted product.

As to better? What criteria for better?
Pretty much all HP and SP loads provide better terminal ballistics than any ball round.

And assuming a compatible barrel twist, better accuracy.