( Opinions ???) between AA # 9 -&- BlueDot

[mak91]

I've run blue dot and #9 subsonic loads in a 7 inch with a gas port 1.5 inches back from pistol position and 10 inch upper with a pistol gas port position. My best plinking load for the 7 inch is 7.2 grn of blue dot under a 147 grn fmj. This load cycles fine in the 7 inch but not so well in the 10 inch upper. The 7 inch upper will cycle loads down to subsonic 110 grn without issues. 8.5 grn #9 under 240 grn smk runs well in both uppers. Both loads are pretty quite and pretty clean burning. After shooting the blue dot loads the gun looks almost like it hasn't been shot its so clean.

[justshoot]

ya I have used #9 for high-Vel & subs with pretty good success for a few years . But it was just recent in the past two weeks I grabbed a Lb. of BlueDot because all the usual Retail sales spots I usually buy, was out of #9 .
' Ya Also ' my Gas-Block on the 8.5 is positioned real close to the Chamber in pistol position . & I am sure that did not help things when I light up the test rounds .

On the +Plus . I do Like the way the fluff Flake BlueDot fills case capacity over the #9 .

I have burned and shot Way faster powder than the BlueDot & I always take BIG caution with the fast burners . but I just surprised on the ripping I took on the Bolt/carrier the other day . & In No Way did it represent the visual ID I did on that Burn-Chart . & before burning the BlueDot I did pull-up a burn-chart & it placed BlueDot right next to the #9 .
But today I pulled-up another & it was about 5 to 6 positions Higher on that Burn-chart . & THAT would explain the Over Aggressive extraction marks & the pounding it gave me on the bolt/carrier with the slightly down-loaded test rounds with it .

I am just a Little Throttle-Shy today on loading some more rounds threw the Chrony. ....LOL , ;) & I am getting over it .

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