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Old March 13, 2012, 10:53 AM   #13
Senior Member
Join Date: September 6, 2011
Location: Wyoming
Posts: 1,320
Roper, I did see the differance, but it got worse the closer I got to the max (25.3).

I did missread the test barrel length, I was seeing 20" not 24". Oops! Thanks for the heads up.

That does make me feel a bit better, but I am still over 300 fps slow at 25.3 gr. The SD for all loads was higher than 20. Lowest ES was 51 with a 23.6 gr load (SD 23) and velocity at 2783 fps.

I have a DPMS with a 20" barrel, I'm gonna chrony these same loads through that gun. See what happens. It appears that barrel lenght is the culprit, not my chronograph. Thanks guys.
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