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Old 01-27-2017, 07:09 PM
B23 B23 is offline
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Default Defensive Edge Rifles 204 Terminator in the works

I got the .20cal bug a few months ago and was originally just going to buy another CZ 527 Varmint but in 204 Ruger. Already having a brand new Rem 22-250 Varmint ADL I got on sale at Cabelas I thought about doing a semi custom 20-250ai but then I got to talking with the Carlocks at Defensive Edge Rifles and they told me about their 204 Terminator that they've been developing and having a passion for speed, the more they told me about it the more I was hooked.

The 204 Terminator is certainly not going to be something you take to a Pdog town and bang away all day. Not something anyone that shoots a hot rod anything doesn't already know, but even though the barrel life will likely not be much longer than 600-ish rounds, shooting the Berger 55 grainers at 4100fps and maybe even a little faster or the 40's at 4600+ sure will be a whole lot of fun. I can only imagine what this thing is going to do to a coyote let alone a rock chuck.

Usually Defensive Edge Rifles has my builds done in 3-4 months but getting a barrel is going to take a little longer so I'm expecting the wait time to be a little longer on this build.
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Old 02-02-2017, 06:05 PM
visiter1 visiter1 is offline
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intrested to see what case this is built on ? also best of luck with the build
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Old 02-02-2017, 06:51 PM
B23 B23 is offline
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Originally Posted by visiter1 View Post
intrested to see what case this is built on ? also best of luck with the build
Necked down 260Rem then improved to their proprietary shoulder angle and case taper. I believe it's a 35 degree shoulder but I don't recall exactly.
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Old 02-03-2017, 08:56 AM
visiter1 visiter1 is offline
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o god id love to see pics when you get it up and running
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Old 02-03-2017, 10:14 PM
260Ackley 260Ackley is offline
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So basically a 308 necked to 20 cal with different shoulder angle..... That is going to be something
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Old 02-03-2017, 11:12 PM
B23 B23 is offline
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Like I said earlier, I thought about doing a 20-250 or 20-250 Improved because they're no slouch either, but I figured what the heck, why not have something a little different and even faster. One of the things that's really nice is they neck all the Lapua 260 Rem brass down and fireform it for me for a very reasonable fee. Knowing this gun will have a short barrel life anyway, that's a nice feature to have.

My original plan was to use a 26in tube but then I changed my mind and thought I wanted a 28in barrel since I won't be putting a brake on this one but now I'm back to the original idea of going with a 1-8tw 26in. tube.
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Old 02-04-2017, 01:01 AM
rickiesrevenge rickiesrevenge is offline
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You might consider a slower twist. I know berger recommends an 8 twist but there are an awful lot of guys here running 9 twists and they are shooting mere mortal cartridges that aren't nearly that fast. I don't think it'll take too many rounds before you start blowing up bullets in mid air. Which is kinda fun the first time you do it but gets old quick.

Aaron
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Old 02-04-2017, 02:07 AM
260Ackley 260Ackley is offline
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I don't remember the twist of the barrel but trotter did a 20 caliber off the 220 swift. I'm guessing it may similar capacity and you could mimic that twist rate.
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Old 02-04-2017, 07:08 AM
B23 B23 is offline
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Originally Posted by rickiesrevenge View Post
You might consider a slower twist. I know berger recommends an 8 twist but there are an awful lot of guys here running 9 twists and they are shooting mere mortal cartridges that aren't nearly that fast. I don't think it'll take too many rounds before you start blowing up bullets in mid air. Which is kinda fun the first time you do it but gets old quick.

Aaron
Berger actually recommends a 1-7tw for the 55's but I think that's mostly geared toward the 204 Ruger and 20 Tac/Prac cartridges that shoot a fair bit slower.

If you go by Berger's twist calculator a 9 twist only yields a marginal stability factor with the 55's, even launching them at 4100fps. I've heard of guys claims of shooting the 55's with a 9 twist in their 20-250's but the ones I've been able to verify have all had 8 twist barrels. I'm sticking with the 26in. 1-8tw Krieger on this build.
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Old 02-04-2017, 01:29 PM
rickiesrevenge rickiesrevenge is offline
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I wish you the best of luck with this endeavor. Please post about it so we can follow along with your progress.

Aaron
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