.20 VarTarg

Discussion in 'Small Stuff--22s, 20s, and 17s' started by Jud96, Jun 20, 2017.

  1. Jud96

    Jud96

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    I am planning to put together a .20 VarTarg this summer and I have a couple questions. First, how does a 9 twist do with 39/40gr bullets? Does it tear the jackets up or cause inaccuracies? And lastly, what barrel length do you guys recommend? I was thinking about 20" but not sure if that's too short or not. Thank you!
     
  2. Terry O

    Terry O Silver $$ Contributor

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    I feel a nine twist is over kill for a VarTarg as an eleven will stabilize any of the 39/40 class bullets there's really no need to over spin them. In my opinion the 32's are better suited for the little case anyway. You should be fine at 20" but the ones I've built have 24"s, the added weight aids in watching the show.
     
    Last edited: Jun 20, 2017
  3. Phil

    Phil Gold $$ Contributor

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    39/40`s..........build a .20-223 AI

    32`s.............build a .20-221 AI

    11 twist is all that`s necessary for either, mine measure 28" for the extra velocity.
     
  4. Eddie Harren

    Eddie Harren Gold $$ Contributor

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    Pure Scripture!
     
  5. Jud96

    Jud96

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    Okay thanks guys. I might just get a 12 twist and shoot the 32s. Will I be giving up a lot of speed with a 20" barrel compared to a 22-24"? Thanks
     
  6. 7stubby

    7stubby Some days it doesn't pay to even get out of bed. Silver $$ Contributor

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    I have a Vartarg with a 20" barrel. With 32s I get around 3600fps. All the stuff I have shot with it doesnt complain.
     
  7. Phil

    Phil Gold $$ Contributor

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    My .20-221 AI will crowd 4100+ with the 32`s and AA2200 powder..........
     
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  8. swd

    swd Gold $$ Contributor

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    That must have some great splat factor!
     
  9. DogBuster

    DogBuster Silver $$ Contributor

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    Bench/table gun ? Carry gun ? My 20VT dates back to 2006-2007......

    Started life as a 204R chamber.......12 twist.......no issues with 40 V's.......

    This was long before Lapua built FB brass....all was to be had was Rem FB brass...

    Or...reforming 223 brass to VT.....which was/is labor some.....now dies & brass are

    a snap.....my VT barrel is 25.5" finished length now...Savage s/shot....16# table gun......

    During its life as a VT....it has kilt a ton of p/dogs.......19/H322 & moly 40 V max...awesome !

    The only thing better than a VT ? 20-222.......as I've suggested before.........:)

    [​IMG]
     
  10. Tiratore

    Tiratore

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  11. Jud96

    Jud96

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    This will be a bench only rifle so weight isn't an issue. My shots will be under 300 yards on eastern ground hogs. Between the 32s and 39/40s what would perform the best at these range and on ground hogs?

    Also my reamer is .232 neck, has anyone ever used Norma .221 brass and not had to neck turn? Thanks
     
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  12. Greg Taylor

    Greg Taylor Site $$ Sponsor

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    Jud,

    Great choice of caliber. I built another one this year (3rd) and I am sure this one i'll keep....Hopefully. All the previous ones people bought off me after videos / hunting trips with friends. As others have said, I like the 32's for this caliber. There are better choices if you want to go with the 39/40 and bigger bullets. Keep it small, keep it light, and keep it under 400 and you'll be good! 1-12 will do fine for the 32....1-11 will handle everything. Most importantly have fun with it and lets see some down fur.

    As for norma 221 brass...i have never used it but the lapua works great. My neck is .234 and I do not need to turn necks.
     
  13. Prose

    Prose

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    There is a fellow on the saubier blog that has tested a million bullets through 1-11 and 1-12 twists on his vartargs. The consensus there is that if you want the flexibility to use any bullet, 1-11 is a great choice. A 1-12 "may" stabilize a 39, but probably not a 40.

    My next barrel will be an 11 twist so I don't have to worry about anything at all.

    As for the neck, .232 can be a pain. I would pay the extra 35 bucks to have the barrel maker chamber it with a .234 or so. You'll save the money on neck turning tools and time spent IMHO.
     
  14. Tiratore

    Tiratore

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    Chucks hit over 400 have often made it down their holes and we've elected not to shoot over, oh, 450 any more. I use the Sierra 39 for woodchucks and prairie dogs in a one in twelve twist Hart barrel that measures pretty close to that twist rate. If I wanted to shoot the Hornady 40 or the BIB 40, I'd go with a faster twist, but the one in twelve has handled the shorter Berger 40 well enough to be competitive, and, of course, the 39. That's based on a sample of two barrels, so use your judgement.

    As I recall, the Normas didn't need turning for the 0.232 neck chambers, but you may want to consider turning the slightly thicker Lapua cases - you will wind up with more uniform necks and only a couple of mils need be trimmed off. It's a pretty painless process. I use a K&M tool and drive the cases with a cordless drill. Or I did, before I bought a used Sinclair gear motor gadget. One pass with the tool set to produce a neck of just under 0.013 does it.
     
  15. Yote Hunter

    Yote Hunter

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    I have a 1:12 wrist that shoots Berger 35 gr varmint bullets exceptional but they loose their oomph past 250 yards or so due to low BC. Will not shoot the 40 gr Bergers, 39 Sierras, or 40 gr vmax very well. I regret not going 1:11 twist but the Bergers are impressive at 200 yards. Future build will be at least 1:11 twist.
     
  16. Tiratore

    Tiratore

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    Hmmm. It would appear there is no hard and fast rule here.
     
  17. Yote Hunter

    Yote Hunter

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    I would definitely not chance being marginally stable over 1" of twist. It shouldn't affect accuracy, speed, or pressure. Mine is a benchmark barrel.
     
  18. Prose

    Prose

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    I'd say the rule is a 1-12 twist is best if you only intend to shoot 32 gr bullets.
     
  19. bobcat93

    bobcat93

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    20/223 AI
    Sounds like barrel burners..if a .20 practical is getting 4000 fps with no problem
    Is a 20/233 AI getting 4500fps..how fast can we push bullets before they just rip apart ?.. how long will a barrel last? 1500 rounds?
    Sounds like a very interesting cartridge, yet better left to a person who can turn out there own barrels in there shop..
    Just thinking out loud..am I far off?
     
  20. Wirelessguy2005

    Wirelessguy2005 Silver $$ Contributor

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    20-223ai is not a barrel burner. Basically it's just a 20 practical that's been ackley improved for better brass life and less sizing/trimming required. It's an excellent cartridge in my opinion and the barrel life will be similar to 20 practical or 20 Tactical.

     
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