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Consistent Fliers ? 357mag carbine load

Discussion in 'Handloading and Reloading' started by fourdollarbill, Apr 17, 2009.

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  1. fourdollarbill

    fourdollarbill Member

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    A while back I was trying to find a decent load that worked well in a 6" GP100 and an 1894c so I could just load one round and plink away. This is a problem I cannot figure out. The same loaded 150gr lswc using 2400 and or Bullseye will shoot a great POA from both guns. When I load a 125gr XTP or a 140gr XTP's with a mid to heavy using 2400 the 1894C will shoot same POA and the GP100 will shoot 3" up and 2" left of the POA and it stays consistent. I did not take the 2400 to the bottom end light load but I did try switching primers. Here are the primers used in order. CCI550, CCI500, WSP and the GP POA stayed high left.
    I found my perfect plinking round but now I have this new problem.:banghead:
    Is this typical? Do you have any suggestions?

    GP100 150grLSWC - 2400 good POA
    1894C 150grLSWC - 2400 good POA
    1894C 125/140 XTP - 2400 med to hot good POA
    GP100 125/140 XTP - 2400 med to hot HIGH LEFT POA consistent.
    The hot loads were all weighed using a Redding Beam to assure no boomers so I know they were all the same.

    One unique note: The cci500 did pretty well with a med hvy 2400 load.
     
  2. rcmodel

    rcmodel Member in memoriam

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    It is not at all unusual for a handgun, or rifle for that matter, to change POI with different bullet weights, or velocities.

    That you found a lead bullet load that works in both guns is good.

    That the jacketed bullets at higher velocity do not is no surprise.

    More recoil, or a faster recoil impulse in the handgun moves it before the bullet gets out of the barrel.

    I know of no way to change it, as it is simple physics, and those rules are set in stone.

    rc
     
  3. fourdollarbill

    fourdollarbill Member

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    Good enough for me!
    I don't even hunt anyway but I sure do love to blow up water filled milk jugs.
    Thank you for the info.

    Funny thing is. This is the first time with top of the scale loads and I thought I damaged the GP. I never did like Hot loads so I'll just stick with the plinkers.
     
  4. ReloaderFred

    ReloaderFred Member

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    Changing the point of aim with a different load or gun is pretty common, and isn't a case of having fliers. Different load combinations will shoot to different places on the targets.

    It's been my experience that every .357 firearm I have has shot better with heavy bullets. You might try something like a 158 grain bullet, on up to 180 grain bullets, and see if you can find a load that will shoot to the same point of aim in both firearms.

    There's a lot of barrel length difference in those two guns, so the harmonics and burning characteristics are going to differ considerably. It's probably going to take a compromise to get a load that will work in both firearms.

    I would also try different powders. That often makes a big difference.

    Hope this helps.

    Fred
     
  5. Thingster

    Thingster Member

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    Or just pick the load that you like and sight your guns in for that load.
     
  6. Eb1

    Eb1 Member

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    I was thinking the same thing. If the load groups good in both guns, just change the sights to shoot POA.
     
  7. Ben Shepherd

    Ben Shepherd Member

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    Heavens yes!! If you've got one load that's fast enough for you and groups well out of both, regulate the sights on both guns to that load and call it a day.
     
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