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Reloading Berger Bullets



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Unread 04-09-2012, 05:37 PM
Platinum Member
Join Date: Apr 2010
Location: Allen, TX
Posts: 2,608
Re: Es?

It sounds like you're zeroing in on a great load.

Chrony's don't report on group size/accuracy. But, they have their place.

They don't even have to be terribly accurate to be useful. While the readings are affected by lighting and other conditions, relative shot to shot measures are pretty good.

As such, your chrony may register 2715, 2700, and 2730 fps for the same load travelling at the same MV on three different days. But, if you fired those 3 shots within a few minutes of each other, you may well find them to be within a few feet per second.

As such, a given shot string with low SD and ES is fairly certain to have low SD/ES even though the actual velocity may be +/- 15 fps from what was reported.

And the more samples you collect, the more confidence you'll have that the trend will continue.

-- richard
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  •   #16  
    Unread 04-09-2012, 06:01 PM
    Gold Member
    Join Date: Jul 2010
    Location: Mount vernon, OH
    Posts: 681
    Re: Es?

    Originally Posted by Fla shooter View Post
    Shooting all five take a few secounds to reset chony !i bumped it up to 70. Of retumbo n it dropped to 2883 to 2860! Cant figure why it dropped
    Compressed load?.

    "Let glorious acts more glorious acts inspire,
    And catch from breast to breast the noble fire!
    On valour's side the odds of combat lie,
    The brave live glorious, or lamented die;" - Iliad, Book V
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    Unread 04-09-2012, 06:27 PM
    Silver Member
    Join Date: Jan 2012
    Location: Crawfordville florida
    Posts: 114
    Re: Es?

    Im working on it richard ! 7mm ! I want it better if I can !!!! Whats compressed load ? Bullet is not copressing powder
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