With 55's and 62's I'm mostly doing high volume. Not paying too much attention to the brass, other than seeing that they are in good shape. They shoot well enough for what they are.
With the 69 SMK's, along with FL SB sizing, trimming and cleaning up the burrs. I treat the primer pockets and flash hole and make sure each five round string has brass that weigh close to the same. That's it.
I haven't played with the Hornady products as yet. Not enough to come to any conclusions. I did notice that Hornady makes two completely different 68gr HPBT bullets.
One, with a cannalure, is much shorter (.917") than the one without a cannalure which is just around .983" long. If you find you have the longer bullets, the 1-8" twist should be used.
Generally, each barrel is going to have it's own likes and dislikes, but with these 223/5.56 ARs there are curtain loads (nodes) that most of them seem to like.
Have fun..
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