I realize it is not a S&W related question, but I take a chance.

I finally broke down and bought a new Armalite 5.56 NATO. I plan to reload it on my 550B and if things go well, perhaps move it to the 650. I will use regular hornady 223 brass.

I know a few people on this forum reload for the black gun, so I have two short questions for you:

1) What do you use for bullets? I was planning to use 69 gr HPBT, but is it a good choice for a short 16" barrel with a twist rate of 1 in 9?

2) Am I too optimistic in thinking to eventually use the 650B machine to reload the 223 cartridge?

Regards,
Guy-