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Anybody checked factory ammo for velocity variance

Discussion in 'Shooting Related Threads' started by mrskeet410, Dec 1, 2009.

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  1. mrskeet410

    mrskeet410 TS Member

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    Has anybody here checked factory ammo for velocity variance? If so I'd like to know what you found. Was there any difference in results for premium ammo, (STS, AA, Gold Medal) and promos? imports?
     
  2. Unknown1

    Unknown1 Well-Known Member

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    Waste of time; there will be variances.

    What would you suggest be done about them?

    MK
     
  3. Post  2

    Post 2 TS Member

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    Most of the top shooters shoot factory ammo and what ever variation ther might be doesn't bother them. Post-2
     
  4. grnberetcj

    grnberetcj Active Member

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    Personally, I always have wondered about the angle of the fandangle!

    Curt
     
  5. Auctioneer

    Auctioneer Well-Known Member

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    I got such bad varieance out of a case of STS shells that I saved some boxes and sent them back to Rem. They said the shells were within their guide lines. If they are within their guide lines then their quality is dropping badly and fast.
     
  6. sliverbulletexpress

    sliverbulletexpress TS Member

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    I sincerely don't think you can accurately chronograph shotgun ammo (except slugs)with consumer grade equipment. So it's a mute point.
     
  7. Klay_Buster

    Klay_Buster TS Member

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    Pact Chronograph results. 10ft to frist screen 11/24/09

    Factory Remington light 8, 1 1/8oz published speed 1150 5 shot groups
    Ave 1159fps, high 1176, low 1114, ES 62, Sd 25

    Factory Fedral 1oz , 8 published speed 1180fps
    Ave 1222, high 1238, low 1203, ES 35, Sd 14.3

    My reload using STS hulls fired 5-6 times, 1 1/8oz, 8's, 18.1 clays, wjammer
    Ave 1169, high 1195, low 1116, ES 78.9, Sd 31.2

    My reload using once fired STS hull, win209, 1 1/8oz, 7 1/2, Fig 8, 20.4 Am Sel
    Ave 1222, high 1233, low 1210, ES 23.8, Sd 10.9

    You can see that using hull fired many times opens the extreme spread.

    Factory Federal 3, 7 1/7 published at 1200fps
    Ave 1214, High 1229, low 1206, ES 23 Sd 10.6

    My hdcp sts reload matches factoy fed's extreamly close.
    Regards, Dave
     
  8. mrskeet410

    mrskeet410 TS Member

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    Good stuff Klay Buster. Thank you.

    Anybody else?
     
  9. Shooting Coach

    Shooting Coach Well-Known Member

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    Having clocked many loads, I am impressed by the consistency of Federal ammo, even their promo shells.
     
  10. zzt

    zzt Well-Known Member

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    I only shoot STS shells when shooting factory. I've chronoed several batches and I get an extreme spread of between 25 and 35fps.

    I reload STS and Gun club hulls and I never, ever get the SDs that Klay Buster reports. Geez! They are awful.

    Here is some typical data using STS hulls unless noted otherwise:

    STS209 primer, 17.5gr e3, Fig-8, 1 1/8oz shot Av Vel 1193, SD 8.33

    STS primer, 18.4gr Am Sel, Fig-8, 1 1/8oz shot Av Vel 1148, SD 8.94

    W209 primer, 18.4gr Am Sel, Fig-8, 1 1 /8oz shot Av vel 1158, SD 7.36

    above shot on 7Aug07, 85deg, 85% hum, .018" choke

    Here's my long time favorite handicap load:

    W209 primer, 19.1 Green Dot, Fig-8, 1 1/8oz Av Vel 1180, SD 7.3 85deg. .032" choke.

    same load and choke at 65deg: Av Vel 1169, SD 8.06

    Here is my newer favorite handicap load:

    STS209, 19.2gr AM Sel, Fig-8, 1 1/8oz Av Vel 1240fps, SD 8.96 18Aug08, 85deg, 45% hum, .019" choke

    Here is a variant:

    W209, 18.7 Am Sel, Fig-8, 1 1/8oz Av Vel 1198fps, SD 8.96 28Apr09 84deg 50% hum, .019" choke

    Same load on 31 Oct09 65deg 90%hum, .019" choke: Av Vel 1190fps, SD 12.86

    I'm not that fussy about hulls, as long as they are not split. I get the same SDs even when they have been reloaded 6-8 times. As long as the mouth is still stiff enough to give a good, consistent crimp, you are good to go.

    On some loads I get higher SDs. For example, my GM bunker load gets SDs in the 11.0 to 15.0 range. That's high for me. BTW, all these reloads are right off the press, with no special treatment. The worst SD I ever got was when I tried to load my bunker loads light. The pressure dropped to low and I got SDs of 30. Bringing the charge weight back up cured the problem.
     
  11. Neil Winston

    Neil Winston Well-Known Member

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    Me neither. An SD of ten to fifteen is normal for factory shells, sometimes half that but it never repeats if it's much below 10. I never could get my PACT to work; maybe KB has the same problem.

    Neil
     
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