assistance request..

Discussion in 'The Ammo & Reloading Forum' started by JLA, Dec 3, 2011.

  1. JLA

    JLA Well-Known Member

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    Im calling on the assistance of my fellow reloaders here that endulge in shooting and reloading .44 magnum. I need length measurements on a few different bullets ifn you guys have them and a caliper handy..

    hornady 225 gr. FTX
    hornady 200 gr. XTP
    hornady 240 gr. XTP
    and hornady 300 gr. XTP

    Working on a lever action .44 mag project and trying to match a certain weight/brand projectile to a certain velocity spread to the 38 twist bore.

    I done F' ed up and went and burned 30 bucks on bullets I 'figured' should work but when i got them back home and run the numbers I found 2 things I didnt take into account, #1 the bullets were longer than I expected which made them have a higher twist rate requirement, and #2 the velocity expectation was lower than I expected which again adds to the twist rate requirement.

    The rifle doesnt shoot the 180 gr XTPs worth a damn no matter what powder I stuff in the case, I run the numbers on them and the 38 twist barrel is overspinning the bullets by more than 30% which im fairly certain is contributing to their inaccurate flight pattern.

    help me out if ya can fellas.

    :patriotic:
  2. Caneman

    Caneman Active Member

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    bullet length:

    hornady 225 gr. FTX ???
    hornady 200 gr. XTP - 0.675 (from quick load)
    hornady 240 gr. XTP - 0.703 (actual measurement from my stock)
    and hornady 300 gr. XTP - 0.827 (from quick load)

    hope that helps some...
  3. carver

    carver Moderator

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    I've never shot anything in any of my .44mags execpt for the 240 gr bullets, both store bought, and home made. They both shoot about the same. The lever guns for pistol rounds are not that accurate, but I can do a 3" group off a rest at 100 yds with open sights when I do my part. Should have read your post yesterday, but I had to get up, and go! Caneman has given you more information than I could have.
    Last edited: Dec 3, 2011
  4. JLA

    JLA Well-Known Member

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    I know carver. Id be happy with 3 MOA, but those 180s (only bullets I have in stock right now) are doing good to get 8 MOA and they arent favoring a particular side of the target either. some hit POA, others hit all around. My math says the 180s at .555" long running 1600-2000 fps only require about a 47 twist ideally to stabilize and im running them down a 38 twist tube. Im fairly certain the excessive spin is causing excessive bulet yaw. If I slow them down to CAS velocity they shoot great but thats because the lack of velocity increases the twist requirement of the projectile. but I gotta run them slower than 900, which is tough in a rifle length .44 mag.

    And thanks a bunch caneman. Huge help brother! Im gonna crunch the numbers now and see what I come up with.

    Only need the measurement off the 225 FTX guys. :)
  5. JLA

    JLA Well-Known Member

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    Looks like the 200 gr XTP is ideally suited to the 38 twist .44 mag rifle bore. at a velocity range from 1600-2100 fps the bullet requires 38 to 44 twist respectively. Which should give it good stability thruout its effective range.

    At this point I dont even think I need to run the numbers on the 225 FTX. The 265 FTX measured 1.025" which is a bunch longer than the 300 XTP and required a 22 twist to stabilize. I wanna use em but id need a ruger K77 carbine to run them.
  6. JLA

    JLA Well-Known Member

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    And just as a side note, the 240 gr XTP is only stable in the 38 twist at 1700 fps or more, which requires you run it at maximum pressure to keep the bullets stable.

    Now that I have most of the math worked out ill go grab the right bullets and see if I can get better than 3 MOA. ;)
  7. carver

    carver Moderator

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    Josh, I'm running 240gr Hornady XTP's at 1250fps, from a 5" barrel, and doing alright at this time shooting them in my lever gun. I have no idea what the bullet speed is out of the longer barrel, but I know it isn't anywhere near max. I understand that information I saw on another site says that the Beartooth .432" 280 grain hard cast GC bullets works well in the 1/38 twist barrels. You might want to check them out.
    Last edited: Dec 3, 2011
  8. Caneman

    Caneman Active Member

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  9. JLA

    JLA Well-Known Member

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    Yeah, I dont think im going to bother with the 225 FTXs. Prolly stick with the proven XTPs.

    Thanks caneman for the info. Helped alot!
  10. JLA

    JLA Well-Known Member

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    ill check em out myles. If i did go cast it would definitely have to be .432". the marlin .44 mag microgroove barrels slug .4315" by the factory spec sheets. Normal cast bullets would shoot horrendously in them im sure.
  11. oldgunfan

    oldgunfan Member

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    Sorry I don't have any 44 xtp's but if it helps you any I have a box of speer 240grn JHP's they are 685" in long and .4295"
  12. JLA

    JLA Well-Known Member

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    The .675" quickload lists for the hdy 200 XTP is wrong. I just brought 2 boxes home and they mic .604", the .240s mic .703". Dangit this changes everything.. Still gonna test em and see what they do. I sure wish hornady made a .430 dia 225 gr XTP. Extrapolating from the length of the 180s @.555, and the 200s @ .604", I think theyd mic around .665" or so.

    Looks like ill be trying to run the 240s as fast as I can get em.
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