I guess if your not going to match prep brass, than I guess brass may not be that big of a deal. However, excellent brass such as Lapua and Norma help you attain better accuracy and if you prep it, it even improves your chances of better groups at longer ranges. Every bit helps when shooting out to 1000 yards.
You didn't say what kind of varmints you want at 1,000 yd. It do make a difference.
For 1,000 yd PD's, I would pick a very heavy (and accurate) .204 or .223 and set up on the edge of town with the wind at my back (6 o'clock). My .222 Mag ran circles around my 6mm in body count at long range in South Dakota because I could see my misses and correct for them... not posible in larger cartridges.
Of the 6mm's you listed, the 6mm Rem or the 6mm AI are probably the best. The AI will give you another 100 fps, but may not be worth the fireforming, if you want a lotta brass.
I'm building a 6mm Rem, and haven't decided if I want to go with the AI, because I have 600 pcs of brass, and that's a lot of COW to be shooting over the countryside.
I have a 6mmBR, and it's no 1,000 yd varmint rifle!!
The 6mm-284 is the fastest of the bunch (faster than the 6mmAI), but it really eats barrels in exchange for only another 100-150 fps.
Last year, I got a 1,000 yd rig for feral dogs and coyotes at ~1,000 ys. It's in .264 Winchester Mag. Very accurate, but it will not be shot over a PD town :(.
Though the 6.5mm (.264) bore is not on your list, there are a lot of very effective cartridges in that size that would do well at 1,000, and barrel life will be better than the hot 6mm's.
For US made brass, most long range shooters are using Winchester, then Remington, and Fed last. Fed used to be good, but they have slipped over the last 10 years.
The last bunch of Fed "Gold Match" (???) brass I bought, varied in weight from 155 gr to 176 gr, and velocity spread (ES) from the weight variation was 125 fps :(
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Last edited by CatShooter; 09-08-2007 at 11:28 AM.
Reason: Phat phinger syndrome!
I will be shooting at squirrels and PDogs. I guess I should have clarified that in the post. That information might have made the topic a little better. Maybe more will get involved in the discussion.
Also, if you build a heavy 6mm with a muzzle brake, you can see where shots miss or hit much better than any .22 cal. My new 6mm project will weigh 32 pounds, and it will have a brake too.
The subject of burning barrels is usually a topic when discussing varmint shooting. However, at long ranges there are not as many shots taken. Also, must varmint hunters bring at least two and sometime three rifles during there hunts to allow their other rigs to cool. That's why I chose the 6x284 as the best overall long range varmint cartridge.
Now, if you only have one rifle to shot all day for varminting and there will be shots from 100 to 1000 yards, then I would say the 243 or 6BR would be the best.
Also, the velocity of the 6x284 is 200fps faster than the 6mm Ackley Improved and 400fps faster than the 6mm Remington. That's a big advantage at long range. The 6mm Ackley is an awesome cartridge too. I would have made it my # 2 pick, however, you have to do so much prep to the brass in order to shoot it.
I know there are other excellent 6mm cartridges out there, but when it comes to velocity, accuracy and retained energy, the 6x284 is the best IMO.
Regarding my current 6mm project, I am leaning towards the 6x284. However, I am still trying to gather info on the 6BR. I just really love the 6x284, because I ve seen it perform out to 1000 yards with excellent results. When using the 6x284, and pushing the 87grn V-Max at 3730fps, it's amazing to watch what it does to ground squirrels past 600 yards. Even at that range it destroys the little vermin.
mine is a 1-8 twist 26" hart. I know of several people shooting the 90vld or the smk with a 1-8 twist. I posted pictures of 3 shots at 1000yards with 90gr vld in post earler today titled 1000yrd shooting