Never seen a target or critter that squawked about the bullet speed that killed it. Don't bother with my Chrony anymore.
Used it once or twice, put it back in the box and havn't looked at in maybe 10/15 +years. I let my target tell my if my load is accurate. 5 shots that can be covered with a dime works for me.
And I don't jump from one powder to another just because someone says they got killer results from "X powder".
AA 2230 works for EVERYTHING I load and shoot. AA pistol powder for my handguns. From a 20VT "short" on up to and including my 6.8 SPC. 20BR, 22BR, 6mmBR ,6.8BR and a few in-between. Everything I load for will shoot bug holes!!
You jump around from one powder to another and all you end up with is a bunch of partial jugs of powder that never "REALLY" got a workout. Work it till you can't work it anymore THEN go back and work it again.
Think I've got a pound of Lil Gun but never cared for crushing the flakes, so it doesn't get used. And some stick powders have issues. I hate crushing sticks, they're temp sensitive and they STINK when they burn.
One brand of primer and one powder. Work it till you can't work it anymore then go back and work it again.
NEVER had any issues with CCI primers. Have fired over 5K + and only one primer gave me problems and it was because it laid in the wet grass overnight and fizzed when fired.
CCI Mil Spec in my gas guns. BRs in all of my bolt guns.