303 Epps reloading data ?

[Treeman]

@Treeman. What speed from what charge?

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Its hard to say, because the cases seem to be at various stages of fireform. It seems that if there is any forming still to happen it drastically changes velocity. I have had cases with full 1 grain more charge show lower velocity than the one grain lower charge case.

[Treeman]

I even started doubting my chroni.

new batteries first use.
46.3 gr -2438
47.3 gr 2520
47.7 gr 2448
48.8 gr 2506

So is the 46.3 -47.7 - 48.8 correct and the 47.3 the false reading, or 47.7 the odd reading . I am assuming that energy is being lost due to case expansion still happening.
Problem is 47.3 was touching holes and 48.8 2 touching one a bit off.
Are the cases odd because of annealing ?
Is it the not yet formed cases ?
Am i just a dick ?

[Tripodmvr]

I even started doubting my chroni.

new batteries first use.
46.3 gr -2438
47.3 gr 2520
47.7 gr 2448
48.8 gr 2506

So is the 46.3 -47.7 - 48.8 correct and the 47.3 the false reading, or 47.7 the odd reading . I am assuming that energy is being lost due to case expansion still happening.
Problem is 47.3 was touching holes and 48.8 2 touching one a bit off.
Are the cases odd because of annealing ?
Is it the not yet formed cases ?
Am i just a dick ?

What are you saying - different COL?

[janfred]

Did you fir the rounds on the same day? 3 shot groups, five shot groups?

[Treeman]

What are you saying - different COL?
[/quote]
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The cases do not, have not yet fully formed to the chamber, so COL is correct, but the shoulder is sometimes still rounded or the walls not yet expanded fully.

[Treeman]

Did you fir the rounds on the same day? 3 shot groups, five shot groups?

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Yes on many days, mostly 4 shot groups. About a 100 attempts.

LATEST>  It appears the reamer used is not on spec. The fired cases are too fat to even fit in a full length sizing die, I am stopping everything now and waiting on gunsmith investigation.