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ProMo powder 7/8 lower the speed

Discussion in 'Shooting Related Threads' started by Fraz, Mar 22, 2012.

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  1. Fraz

    Fraz TS Member

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    Jan 29, 1998
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    Working a 7/8 load with Promo Powder Rem. Hulls, Cheddite 2000 primer, clay buster Tgt 12 type wad (8100). The book puts the 7/8's load over the top 17.4 =1340
    16.7 = 1280, I'd like 1180-90. Looking for a 16 yard smooth crusher.
    thanks
    Fraz
     
  2. goose2

    goose2 Well-Known Member

    Joined:
    Feb 20, 2007
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    2,037
    You can slow them down but what comes along with that is a to low of pressure load to burn clean. Promo is a dirty powder at higher pressures so it will be real dirty at lower pressures. In the summer I practice with 3/4 oz. loads a lot and when I am done my gun and barrel are quite dirty.
     
  3. Dr.Longshot

    Dr.Longshot Banned Banned

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    I dis-agree w/Promo being a dirty powder, I have loaded it from 17 grains to 20 grains and never had dirty powder,

    Gary Bryant
    Dr.longshot
     
  4. Dr.Longshot

    Dr.Longshot Banned Banned

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    Rem STS hull w/TGT wad 17.0 grs Promo 7/8ths oz shot = 1200fps 6,800 psi in the newest AlliantReloaders Guide

    1200fps is the slowest 7/8ths oz load shown in any shell.

    Gary Bryant
    Dr.longshot
     
  5. rexxon631g

    rexxon631g Member

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    84
    I have to disagree also about Promo being dirty, I have used Solo 1000 for years but had trouble getting it last time I needed powder so I bought some Promo even though I had doubts as the rumor was it was a dirty burning powder. While it is not as clean as Solo 1000. with Promo loaded at 17.5 grains for 1 oz loads is no where near as dirty as red dot used to be. But next time I buy powder it will be Solo 1000
     
  6. notquite27

    notquite27 TS Member

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    Aug 19, 2011
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    Try Alliant's new Extra-Lite powder. It is specially formulated for 3/4 and 7/8 oz. loads. Pressures are low, recoil very mild, and it burns clean as a whistle. Alliant's website has a 10 page download of recipes for Federal, Winchester, and Remington hulls. You can also load 1 oz. with it, but the pressure curves are quite high.
     
  7. StonewallRacing

    StonewallRacing Well-Known Member

    Joined:
    Jul 17, 2008
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    1,206
    Location:
    Wisconsin
    I agree with Notquite27.... I'm loading 7/8 oz with Promo and I think if you get below 16.5 or so it's not getting a good burn. Extra-Lite better choice if you want to go below 1200.

    SW
     
  8. mike campbell

    mike campbell Active Member

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    ExtraLite is probably the way I'll go in the future, but I invested in a bunch of E3 before they came out with Extralite. If you compare data you'll see that Extralite gives comparable velocities with 1000-1500 higher peak psi, a good thing when you're operating below 8,000 anyway.

    Anyway, my current favorite is 14.0 grains E3, 7/8 in a gray WW12L (CB clone)chronographed at 1175-1200 depending on the primer choice. And with prices down, F209A are always a good choice.
     
  9. rexxon631g

    rexxon631g Member

    Joined:
    Nov 18, 2009
    Messages:
    84
    I have to disagree also about Promo being dirty, I have used Solo 1000 for years but had trouble getting it last time I needed powder so I bought some Promo even though I had doubts as the rumor was it was a dirty burning powder. While it is not as clean as Solo 1000. with Promo loaded at 17.5 grains for 1 oz loads is no where near as dirty as red dot used to be. But next time I buy powder it will be Solo 1000
     
  10. notquite27

    notquite27 TS Member

    Joined:
    Aug 19, 2011
    Messages:
    247
    Try Alliant's new Extra-Lite powder. It is specially formulated for 3/4 and 7/8 oz. loads. Pressures are low, recoil very mild, and it burns clean as a whistle. Alliant's website has a 10 page download of recipes for Federal, Winchester, and Remington hulls. You can also load 1 oz. with it, but the pressure curves are quite high.
     
  11. StonewallRacing

    StonewallRacing Well-Known Member

    Joined:
    Jul 17, 2008
    Messages:
    1,206
    Location:
    Wisconsin
    I agree with Notquite27.... I'm loading 7/8 oz with Promo and I think if you get below 16.5 or so it's not getting a good burn. Extra-Lite better choice if you want to go below 1200.

    SW
     
  12. mike campbell

    mike campbell Active Member

    Joined:
    Jun 19, 2009
    Messages:
    926
    ExtraLite is probably the way I'll go in the future, but I invested in a bunch of E3 before they came out with Extralite. If you compare data you'll see that Extralite gives comparable velocities with 1000-1500 higher peak psi, a good thing when you're operating below 8,000 anyway.

    Anyway, my current favorite is 14.0 grains E3, 7/8 in a gray WW12L (CB clone)chronographed at 1175-1200 depending on the primer choice. And with prices down, F209A are always a good choice.
     
  13. Ontario Chris

    Ontario Chris Member

    Joined:
    Feb 23, 2006
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    Location:
    NY Finger Lakes
    Fraz,

    I would also recommend the Extra Lite. It creates a high enough pressure to ensure a complete burn at reasonable speeds. I use it always and Charlie sometimes uses it for 7/8 loads. Clean and low felt recoil.

    Chris
     
  14. v-strom 650

    v-strom 650 Member

    Joined:
    Sep 13, 2010
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    172
    I use the same components as the op w/ 15gr of Extra-Lite; very clean and consistent! J.Terre
     
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