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Anyone use these?

Discussion in 'Handloading and Reloading' started by mgrych, Nov 10, 2008.

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  1. mgrych

    mgrych Member

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    Hi all, new to the forum, I just purchased some 55 gr. speer TNT HP and some WW748 powder... And i just realized my reloading manual doesn't cover this specific bullet.. Must be new

    I will be shooting it out of a savage 10fp with 1 in 9 twist

    Any load data would be greatly appreciated

    Thanks
     
  2. dagger dog

    dagger dog Member

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    By the bullet weight and the rifle info you give I take it your shooting a .223?


    Speer #13 starts their 55 gr FMJ-BT #1044, Spitz-SP #1047,and Spitz SP 1049 w can. with Winchester748 @26 grs and Max @ 28 grs c. .

    They also reccommend the use of CCI small rifle magnum primer with 748!

    Lee 2nd lists 55gr jacketed bullet out of .223 Remington with Winchester 748 starting at 26.2 grs. and max at 26.2 grs. ??? but this is the way it is printed in the book.

    Winchesters own data for their 55gr PSP ,and 748, powder WSR primer Win.brass MAX LOAD 26.3 GRS.
    THIS MUST BE REDUCED BY 10 %.

    Their 55 FMJ with their brass and primer shows 26.2 grs of 748, which is MAXIMUM LOAD and should be REDUCED BY 10% to start!
     
    Last edited: Nov 10, 2008
  3. rcmodel

    rcmodel Member in memoriam

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    The TNT bullet might not be the best choice for a 1/9 twist .223.

    You might have the really thin jacketed TNT's blowing up before they get to the target if you drive them fast enough.
     
  4. mgrych

    mgrych Member

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    sorry my bad, yeah its a .223
    Should i start at 26 gr. then move up?
     
  5. depoloni

    depoloni Member

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    Based upon the load data posted by the users above, I'd suggest you start at about 23.5-24.0 grains of W-748.

    Starting at 26.0 is awfully close to the max charges listed for most of the loads above.
     
  6. mgrych

    mgrych Member

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    ok sounds good, so has anyone ever had a bullet of this weight blow up from spinning it too fast? I thought 55 gr. down a 1 in 9 should be well on the safe side
     
  7. NCsmitty

    NCsmitty Member

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    mgrych, it's all about the bullet's construction and the TNT has design limitations much like the Sierra Blitz. The Blitz is designed for 3500fps or less and according to the box info the TNT is limited to 3400fps and twists of 1in10 and slower. So your taking a chance using them. Keep the velocity low enough and they may work. Here's a pic I downloaded. I hope you can read the words. I'm quite sure your box shows the same info.

    I would select a bullet weight of 60-69gr to match your twist. Most of the manufacturers list twist info on their sites.


    NCsmitty
     
    Last edited: Jan 3, 2009
  8. mgrych

    mgrych Member

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    good point, but that box u have there is for 50 gr. im using 55 gr.
    your box says 50 gr. no faster than 1 in 10 do you think the 55. would jump to no faster than 1 in 9?

    My box looks nothing like that BTW..
     
  9. Walkalong

    Walkalong Moderator

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    They shoot well out of my 1 -14 twist .222 Mag. I think Speer recommends a "not to exceed" velocity, but I could be remembering wrong.

    Agh, I see NCsmitty covered it.

    1 in 9 may work as long as you don't push them to hard.
     
  10. rcmodel

    rcmodel Member in memoriam

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    All I know is they make a little blue streak of smoke in the air out of a 1/14 twist 22-250 or 220 Swift with max loads.

    The TNT and the Hornady Blitz were designed back in the day, when .22 varmint rifles all used either 1/12 or 1/14 twist.

    They were intended to give explosive performance in the 1/14 .222 Remington class rifles of the day.

    The heavier constructed normal bullets were designed for 22-250 / 220 Swift performance and they often wouldn't blow up on small varmints at .222 Remington velocity.

    At 3,000 out of a 1/14 .222 Rem, they are spinning 154,286 RPM, and don't blow up.

    At 3,700 out of a 1/14 22-250 they are spinning 190,286 RPM, and do blow up.

    At 3,200 FPS out of a 1/9 twist .223, they are spinning 256,000 RPM, so you be the judge!
     
  11. Ben Shepherd

    Ben Shepherd Member

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    I've launched them out of a Bushmaster M4gery that has a 1/9 barrel without blow up, but my velocity was under 3,000 with the short barrel.

    I suggest you get a chrono, and see how fast a minimum load goes. If the slug is hanging together, and accuracy is OK, run it.
     
  12. snuffy

    snuffy Member

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    Once upon a time-----well I loaded some Hornady SX in 55 grain for a rem 22-250. Knowing in advance that they recommended to stay below 3500 fps ESPECIALLY in winchester rifles, I loaded some to what the book said would be 3200 fps. These loads were for a fun game of shooting water filled milk jugs at ranges from 50 to 100 yds.

    My son was shooting the rifle, he's a good shot, but was missing the first jug. I noticed what looked like a gray rope of smoke about 25 yards in front of the muzzle. Inspection of the plastic jug showed tiny fragments of lead/copper embedded in it. Once in a while they would hold together, then the destruction was awesome.

    So even with the fore knowledge of the do-not-exceed velocities, and being well under the ceiling, I got self destruction. Speer may make their jackets a bit tougher, but I wouldn't bet on it.
     
  13. mgrych

    mgrych Member

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    ok, do you know if the 55 gr. v-max would be self destructive? Or is that a different style and would work?

    I guess i want to know why so many people have luck with 1 in 9 and 55 gr. bullets... Is it just the ones i got?
     
  14. rcmodel

    rcmodel Member in memoriam

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    It just applies to the Speer TNT, Sierra Blitz, and any other light-skinned bullets designed 40-50 years ago for the .222 Rem.

    The V-Max, and any other normal varmint bullet today, will take anything you can throw at it.
     
  15. mgrych

    mgrych Member

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    If i was looking for accuracy and flat trajectory out to about 400m, is a 55 gr. a good choice? I've tried 68gr. with bad results but i think i can blame that on using the wrong amount of powder.... i went straight to the max load without even trying to work my way up and had bad accuracy
     
  16. rcmodel

    rcmodel Member in memoriam

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    Actually, the 50 grain .223 bullet has the flattest trajectory. But also more wind drift then heavier bullets.

    400 M is a fur-piece for a 55 grain load if there is any wind to speak of.

    BTW: Starting at a Max load is not very wise on your part.
    Suggest you work your way up from a starting load and see if you can find a good shooting load somewhere along the way.

    Maximum loads are very seldom the most accurate loads.
     
  17. mgrych

    mgrych Member

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    Yeah, i know it wasn't wise on my part.. my reloading kit didn't come with a manual so all i had to go off of was load data on the internet.. i had nothing to tell me different..
     
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