Anyone loaded Sierra 85gn bullets with 8208XBR?

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  • Retooferab

    Anyone loaded Sierra 85gn bullets with 8208XBR?

    I'm looking for some data for 85gn and IMR 8208XBR? Any suggestions?

  • #2
    You probably already saw this, but a safe starting load would be 29gr, which Hogdon lists as a starting load for the Sierra 90gr. That's where I would start, but I'm cautious with new loads. Given 8208 liking lighter bullets in the Grendel, I bet you could work up a stellar load for that particular bullet/powder combination.

    Hoot

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    • Retooferab

      #3
      Thanks, that's where I started. I'm hope to be able to try them by the weekend.

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      • #4
        I load the 90 grain Speer TNT with 29.9 grains BM for velocity of 2856 out of my 24 inch OW.

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        • Retooferab

          #5
          I loaded some 85gn sierras with 29.0 gns of 8208 and they shot one ragged hole. Not sure of the velocity from my 18" BHW barrel but they are accurate.

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          • sneaky one
            Chieftain
            • Mar 2011
            • 3077

            #6
            You can go with 8208. It is a very accurate ----and---- clean powder !! I shot 110 grn. TSX, and 112grn. Interbonds with 29.0- 8208., = 2660 zone- and the primers were wimpy-safe., room to grow. On those 85-90 grn. units, You can bump up a bit-- try 29.8 as a start point- then, idle up..,but,,,. Below 95 grn. ,. the 8208 seemed to lose it's punch- it equaled x-term, down to the 85 grn. GMX's I shot. I basically loaded x-term and 8208 same -as- ., from 85-120gr.,, 8208 cranks it up once past 105 gr.- then gains -100 fps.- on the 110-120 class,, haven't tried it on any of the heavies yet, and I probably won't, -my rifle likes the lite- to-mid wts. I have some 105-115 Inters., and a few more tries on the GMX-in 100-105grn. class, all with 8208. Try AA's load data on the 85 sierras=benchmark= ( maybe my new lite powder)- it's about 2900 fps. ? Mseric peaked my interest in IMR 3031- we'll see, next spring.

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            • Retooferab

              #7
              I also loaded 120 sierras with 28.1gns of 8208 and they were great. One hole group.

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              • sneaky one
                Chieftain
                • Mar 2011
                • 3077

                #8
                Retoo- BTW, I checked my notes, I made it to 30.8 -8208 with an 85 gr. gmx, ( mid 2800's, 20" bbl.) , which probably has more bearing surface than the 85 Sierra . Start at 29.8.

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                • Retooferab

                  #9
                  I quit at 30.4 but still no pressure signs. I think I'll go on up. The 29.0 were one hole group. There others weren't bad just not what I'm looking for.

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