• Frank's Lesson's Contest

    We want to see your skills! Post a video between now and November 1st showing what you've learned from Frank's lessons and 3 people will be selected to win a free shirt. Good luck everyone!

    Create a channel Learn more
  • Having trouble using the site?

    Contact support

Question about chronograph readings

Jrb572

Full Member
Full Member
Minuteman
  • Dec 7, 2008
    2,878
    1,470
    Missouri
    I am getting ready to load a lot of rounds to go to a competition. It is the first time I have load for myself and not bought factory rounds to go. I have what I think a solid load with 42.2 of xbr 8208 win cases and win primers. I bought a magnetospeed to see what they were running at. Most 10 round strings I stay between 2643 and 2602. But the I get some 10 round strings that get 2643 and 2-3 that are 2593. Should I worry? My sd is normally staying around 10-13. I had one ten round string the sd was 4. I am loading for my .308 22" factory barreled AW. Any help is appreciated. I can post more solid numbers if that helps? I have 5 strings of 10 rounds.
     
    Re: Question about chronograph readings

    clear sunny day?? cloud cover? indoor outdoor? chronos ar every sensitive to light.. and if they are not level you will get weird readings also.. how far from muzzle are you testing.. should be between 4-5 yards for muzzle blast from what I have experienced..
     
    Re: Question about chronograph readings

    ahh ok.. i have herd good and bad about those.. most poeple end up with a tripod version.. they seem to get better and more consistant readings. i have never used the barrel mount version personally
     
    Re: Question about chronograph readings

    34-40 es. The one I had an sd of 4 it was 14. But if I remember correctly I checked every throw with my beam scale on that one