Roy Hunter bullets/ testing

Discussion in '6BR, 6BR Improved & Wildcats' started by tom, Sep 21, 2019.

  1. johara1

    johara1

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    WOW, That is even better than the 105 Hybrid and the 109 to boot.... I shot the 103 VT and Spencers and they sure don't have BC. close to that.... jim
     
  2. geo.ulrich

    geo.ulrich beware of owner Gold $$ Contributor

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    Jim, Tom, I messed up my numbers recalculated to .55 G1 @ 2900 Vapor trails come out to .54 G1 @ 2900 Barts are the same as Roys please forgive
     
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  3. johara1

    johara1

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    Us laymen go by the drops, best we can do .... is there any gain from a 7 twist over an 8 in BC. Jim
     
  4. geo.ulrich

    geo.ulrich beware of owner Gold $$ Contributor

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    not in bc but it will increase stability factor, the numbers I ran were for 1.5 sg if I remember it came up at 8.1 twist was good.....
     
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  5. dgeesaman

    dgeesaman Gold $$ Contributor

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    Don’t feel bad BC is the nerdy cheap substitute for real drop data.

    Also it would be helpful to derive G7s instead and state the range where the data applies.
     
  6. johara1

    johara1

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    Why does Berger give one BC. number and SMK's vary as the velocity drops..... jim
     
  7. geo.ulrich

    geo.ulrich beware of owner Gold $$ Contributor

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    Jim, Sierra is giving the good numbers B.C. changes with velocity. That is why I included it. I will refigure at different velocities and repost numbers for you....
     
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  8. geo.ulrich

    geo.ulrich beware of owner Gold $$ Contributor

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    Jim, O.K. @ 2511 =.53 B.C. IN G1 And takes 7.4 twist . 2901 = .55 B.C. IN G1 And takes 7.6 twist , 3013 = .56 in G1 And takes 7.6 twist , 3124 = .57 in G1 and takes 7.7 twist ..... the G7 model is closer for the bullets we use but not perfect either you will be close dividing in half for G7
     
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  9. johara1

    johara1

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    Thank you sir.... jim
     
  10. sandwarrior

    sandwarrior

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    Ahh, Northwest Montana der. I used to live in Montana.;)

    I was wondering if you ever got over to the Great lakes region. Seems like you're one of the few diehards that will shoot in the cold and deep snow.
     
  11. tom

    tom Gold $$ Contributor

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    Born in North Dakota, and have lived in Maine, North Dakota and Montana....So I really just don't know any better lol. Other than traveling by, the closest I've spent a weekend is Niagara Falls for a wrestling tournament as a kid. I know one person from Michigan (@Alex Wheeler), and that's enough of those people for me :D:D:D, lol. Joking of course, I'm sure he's abnormal for even there!


    Tom
     
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  12. Field & Cave

    Field & Cave Site $$ Sponsor

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    As a Texas & Michigan guy, I’m certain it was his time in Florida that’s to blame.
     
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  13. group therapy

    group therapy Gold $$ Contributor

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    easy out there now, I could use a little Destin time. Florida is our friend:D
     
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  14. sandwarrior

    sandwarrior

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    Yup, things are quite abnormal up here. Most people love the snow here. It's like a religious ritual to shovel it. Me, I'd rather go back to the cold of Montana and not so much snow. My first years here were 322" and 309" and this year is "normal" at around 220". But, don't feel bad for me. We never went below zero this year and the previous two, were two nights at -11 and two nights last year at -17. Other than that it's pretty balmy in comparison.

    N. Dakota is a special kind of hell-cold. Not one damn tree in that state to stop the wind. Montana? It's worth being cold there. Our kids got their Masters at U of M (Missoula) and went to work here at Mich. Tech. That's daughter and son-in-law. And, as long as they work here, the ball and chain ain't movin'. LOL

    I'll have to look up and test some of those bullets. I'm getting back into F-Class and I need good pills.
     
  15. ebert

    ebert

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    what would be a good load for 600 yards with roys 106 6 dasher no turn neck 104 free bore 30 inch tube with rl15 or varget thanks
     
  16. johara1

    johara1

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    Free bore is too short to shoot the loads I shoot..... jim
     
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  17. ebert

    ebert

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    I also have a 6br with a .120 free bore
     
  18. Terry

    Terry Gold $$ Contributor

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    29.5-30.5 gr. Varget or RL15.
     
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  19. CaptainMal

    CaptainMal Silver $$ Contributor

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    Sent Tom a note about BRA chambering for those Roy's "A" bullets. I got some and one looking for the touch seating depth found out my .104 throat reamer is too long. Now this barrel does have .008" recession in 700 rds but all the neck contact I had at touch was .110". Man that is out there to me.

    Asked Tom if a reamer for those bullets should be a .090-.095" throat. No answer yet.

    Now in one of my dashers made with my .124" reamer, I have a solid .140" contact between bullet and neck. Advice on reamer neck length for both Dasher and BRA?
     
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  20. mikeeg02

    mikeeg02 Michael Glantz

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    My reamer for the br-improved has .140" free bore, and it works just fine with bullet a. Quite honestly I wish it had just a little more free bore for where I like things. I like just enough to hold the bullet lol.
     
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