check out black hole weaponry they offer lots of lengths and contours. I might also consider a custom krieger one of these days when I get bored. BHW usually has a shot show special too.
looks like your wanting more speed, there are definate gains to be had handloading, you probably already know that. all I shoot mostly is stuff below 60 grains, I can't find anything that beats 8208 for speed and accuracy in 3 different AR barrels.
