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Consistent Fliers ? 357mag carbine load

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

  1. fourdollarbill

    fourdollarbill Well-Known Member

    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

    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.

  3. fourdollarbill

    fourdollarbill Well-Known Member

    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 Well-Known Member

    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.

  5. Thingster

    Thingster Well-Known Member

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

    Eb1 Well-Known Member

    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 Well-Known Member

    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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