Dale Gribble
Can't starve us out; Can't make us run
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Finally got a chance to get to the range.
Loaded up some Speer 75gr Gold dots. Most published load data for 5.56 does not list 8208XBR, but running off .233 Rem data, I worked up some loads for testing. Book max for .223 using 8208XBR with a 75gr bullet is 22.7 gr.
Loaded 22.2/22.5/22.8/23.1/23.4
***ALL LOADS OVER 22.7 GRAINS ARE OVER MAX***
Pistol (braced) AR platform / 10.3” BA Hanson barrel / .233 Wylde chamber / 1x8 twist
Range - 100 yards
Temp - 63 F
Wind - very light to none
22.2 gr
5 shot string - avg MV (2236)
1.819”
22.5 gr
5 shot string - avg MV (2278)
1.439” - take out the flyer on the far right and the cluster measured at 0.686”.
22.8 gr
5 shot string - avg MV (2316)
1.462”
23.1 gr
5 shot string - avg MV (2390)
1.241” - 4 shots clustered into 0.754”
23.4 gr
5 shot string - avg MV (2446)
1.801” - flyer not pictured, but was above the 4 shots shown. Those 4 measured to 0.743”.
All in all, I’m pretty happy with both the velocities and accuracy from a 10.3” barrel. If my calculations are right, I should be above expansion threshold for that bullet out to 300 yards, which is what I was angling for. Still have a bit-o-tweaking / more testing to do.
Also took my Ruger American (Std. 308 22” barrel) out for its shakedown cruise. I picked it up a Gander a few months ago when they were running 20% off / no tax. Also got the Good Sam discount, so out the door, I was less than $250.00.
Largest group - 1.017
Smallest group - 0.610
Loaded up some Speer 75gr Gold dots. Most published load data for 5.56 does not list 8208XBR, but running off .233 Rem data, I worked up some loads for testing. Book max for .223 using 8208XBR with a 75gr bullet is 22.7 gr.
Loaded 22.2/22.5/22.8/23.1/23.4
***ALL LOADS OVER 22.7 GRAINS ARE OVER MAX***
Pistol (braced) AR platform / 10.3” BA Hanson barrel / .233 Wylde chamber / 1x8 twist
Range - 100 yards
Temp - 63 F
Wind - very light to none
22.2 gr
5 shot string - avg MV (2236)
1.819”
22.5 gr
5 shot string - avg MV (2278)
1.439” - take out the flyer on the far right and the cluster measured at 0.686”.
22.8 gr
5 shot string - avg MV (2316)
1.462”
23.1 gr
5 shot string - avg MV (2390)
1.241” - 4 shots clustered into 0.754”
23.4 gr
5 shot string - avg MV (2446)
1.801” - flyer not pictured, but was above the 4 shots shown. Those 4 measured to 0.743”.
All in all, I’m pretty happy with both the velocities and accuracy from a 10.3” barrel. If my calculations are right, I should be above expansion threshold for that bullet out to 300 yards, which is what I was angling for. Still have a bit-o-tweaking / more testing to do.
Also took my Ruger American (Std. 308 22” barrel) out for its shakedown cruise. I picked it up a Gander a few months ago when they were running 20% off / no tax. Also got the Good Sam discount, so out the door, I was less than $250.00.
Largest group - 1.017
Smallest group - 0.610
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