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What caliber for second barrel?

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Unread 12-03-2010, 06:23 AM
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Re: What caliber for second barrel?

I'd go 6mmBR, 1-8 twist. JohnnyK.
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Unread 12-03-2010, 06:48 AM
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Re: What caliber for second barrel?

Originally Posted by johnnyk View Post
I'd go 6mmBR, 1-8 twist. JohnnyK.

That is what I was thinking after reading a little more. +1 on the 6br. Get a 1:8 and shoot 105, 107, or 115's. Though I have to admit, the 223AI is a very temping cartridge and absolutely no recoil on a heavy gun.

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Unread 12-03-2010, 07:50 AM
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Re: What caliber for second barrel?

I have two different opinions to give you. The first is research a projectile that will mimic the trajectory of the 7mm. This will have to be done at shorter ranges than what you are shooting but it will give you the opportunity to practice judging wind drift. An example, a gentleman that I shoot f class with tells me that a .22 at two hundred yards has almost the same wind drift as a 308 at 1000 yards. I would think if you are shooting a .223 or .243 at 1200 you will get used to doping more wind than will be needing for the 7mm. I shoot a 6mm dasher (6br imporved) in f class. I love this caliber shoots lights out and is very easy to tune. The velocity advantage over a 6br is about 150-200 fps. The dasher and 108's or 105 vld's will run with just about anything out to 600 yds. When we shoot 1000 it is a different story. In a switchy condition the dasher or the 6br will give you fits at 1000+ yards. I have also heard that tuning the 80-90 .223 bullets can be a bit of a headache. I do not know from personal experience. If you are interested in learning more about the dasher PM me.
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