Anyone try Superformance in a 6x47 L ?
- Thread starter jrsolocam
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Darkker
Well-Known Member
Is spooky good in the Creedmoor, HOWEVER.....
This is a VERY progressive burning powder, this means that the burning curve changes shape with pressure. Unlike the standard old-tech and current extruded powders, you can't just add mo, to receive mo.
In the Creed, you can drop pressure to about 50,000 psi and only lose about 75fps from max. Lower pressure is very Mesa, or Butte like; higher pressure (again in the Creed) begins to get peaky like typical powders.
A few examples for you:
Now notice in the "higher" loads in the last two traces, you can see a bump after the pressure drop. Never got to finish the sequence, but all indications are that is the very beginning of secondary ignitions. S.I. are how you blow the last several inches to a foot off of your barrel.
This is a VERY progressive burning powder, this means that the burning curve changes shape with pressure. Unlike the standard old-tech and current extruded powders, you can't just add mo, to receive mo.
In the Creed, you can drop pressure to about 50,000 psi and only lose about 75fps from max. Lower pressure is very Mesa, or Butte like; higher pressure (again in the Creed) begins to get peaky like typical powders.
A few examples for you:
Now notice in the "higher" loads in the last two traces, you can see a bump after the pressure drop. Never got to finish the sequence, but all indications are that is the very beginning of secondary ignitions. S.I. are how you blow the last several inches to a foot off of your barrel.
