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Both are .224" and I was thinking about reloading this 5.7 34gr projectile (attached picture) on a 223 case to reach very high velocities, since that would be one of the lightest 223 (and the lightest one I've seen before was like 45gr or something).
 

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What are the terminal ballistics like? 100 yards, 200 yards, 300 yards? Or was this just an exercise to see how fast it can chrony at?

Beyond achieving a high FPS what is the end purpose?
 

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What are the terminal ballistics like? 100 yards, 200 yards, 300 yards? Or was this just an exercise to see how fast it can chrony at?

Beyond achieving a high FPS what is the end purpose?
I've never really used them beyond **** and giggles. I iron sight grouped about 4" with them at 100 yards and tested them in water jugs 7 yrs ago. I should test them in gel to see if the 1800 fps gain nets us any better soft tissue performance.
 

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I've used the 36gr Barnes VG bullets in my target AR(1:8 twist) for fun. They run fine and shoot great. Never have chrono'd them but they stabilize fine and I shoot them through a suppressor.
 

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It really depends on your twist rate, a 1/12“ barrel would be beneficial. If you have one of the very early 1/14” barrels, better yet!

You could probably get away with the 27 gr bullets in a 1/14” twist barrels. A 1/7” is WAY too fast of twist rate for lightweight bullets.
 

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Both are .224" and I was thinking about reloading this 5.7 34gr projectile (attached picture) on a 223 case to reach very high velocities, since that would be one of the lightest 223 (and the lightest one I've seen before was like 45gr or something).
That’s a damn wild looking round man.
 

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It really depends on your twist rate, a 1/12“ barrel would be beneficial. If you have one of the very early 1/14” barrels, better yet!

You could probably get away with the 27 gr bullets in a 1/14” twist barrels. A 1/7” is WAY too fast of twist rate for lightweight bullets.
remember these bullets are LONG for weight. They will do just fine with 1:9...
 
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