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6MM AI or 6MM - 284

 
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  #15  
Old 03-30-2005, 09:13 AM
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Re: 6MM AI or 6MM - 284

dakor,
First let me say thanks to all who have offered valuable advice, this is a great forum.
To answer your question I want to shoot 75-90 gr bullets at 400+ yds. I have a stock (Except for the bedding job I did) Win 70 HV in 22-250 that shoots .2's all day even with some factory ammo! and it will do a pretty good job (if there is no wind) out to 350-400, so I want something that will reach out to maybe 600 max. So I thought the 80-90 (87vmax) would be a good choice. Can I really expect to get those velositys out of a 6-284?? [img]/ubbthreads/images/graemlins/tongue.gif[/img] Velosity is our friend.

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  #16  
Old 03-30-2005, 10:34 AM
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Re: 6MM AI or 6MM - 284

Chuckster from what you have told you really need to think about a 9 twist it will still shoot the smaller bullets I have even tried the 55 grain Ballistic Tips in mine and it shot them very well. As for velocity I have a 28inch barrel but my dad has a 25inch K&P 12 twist barrel and he is getting 3710 FPS with 80 grain bergers and 55 grains of R-19. I would say you should get good velocity but I would put a 28inch barrel on it. Most people think the 6-284 does not give you much over a 6mm Rem because of what reloading manuals say. The reloading manuals underate this cartridge so bad it makes me sick. [img]/ubbthreads/images/graemlins/tongue.gif[/img] I can prove it to if you have the newer Sierra manual look at the 100 grain max load with R-22 and its velocity. Then look at the max load with R-22 for the 107 Matchking and its velocity. See a difference? They list the 107 max load with a higher charge and 50fps more velocity that tells me right there they are downloading the cartridge because they know their hunting bullets can not handle impacts on game at screaming velocitys. I started shooting the 100 grain Sierra SPBT this year at paper and they shoot around 3450 fps with 52 grains of R-22 and will shoot under 3/4 of a inch with 3 shots at 300 yards. If you would like to see some targets of mine I will gladly email them to you. I do not know what size of game you will be shooting at but I have 10 kills with this rifle on Whitetail deer around the 500 yard mark and it really works well on them. After I get my 105 A-max load the way I like it I am going to try shoot a yote around the 1000 yard mark with this rifle.
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  #17  
Old 03-30-2005, 10:55 AM
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Re: 6MM AI or 6MM - 284

dakor,
Sounds great! I am a varmint hunter, primarily woodchucks/prarie dogs but will take a yote if the oportunity presents itself. I think you may be right I may want a 9 or 10 twist to shoot the heavier bullets better. My 6AI is a 1-8 twist and it shoots the light bullets great!
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  #18  
Old 03-30-2005, 07:01 PM
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Re: 6MM AI or 6MM - 284

Dakor,
I was not meaning to slight you, but it is the truth you give up nothing going to the 6mmAI over the 6-284 for medium weight bullets (70-90gr). In my 6mmAI I have a load that shoots 70gr Blitzkings at 4008fps, in my 6-284 I cant even come close to that with more powder. but now if you are talking 107gr Matchkings ,my 6-284 outruns my 6mmAI by 200fps. you say 3-4gr more powder wont burn up your barrel faster. that is what I was saying IT DOES been there done that .as for your other argument "that is like saying a 22-250AI will get better barrel life than a 220swift and that just is not true" you are absolutely correct a 22-250AI will burn up the barrel faster than a 220 swift because it has a bigger powder capacity,been there done that as well.
B
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  #19  
Old 03-30-2005, 08:01 PM
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Re: 6MM AI or 6MM - 284

AMEN! brian b you are on the right track. Anytime you get overbore capacity and have to burn a bunch more powder to equal the same velocity as the more efficient case design., you pay the price in barrel life. Does this mean we give up our wildcats? Heck no! But lets remember it's just a different argument. .22-.243 Middlestead, .22-6mm you want to talk velocity, you win. You want to talk barrel life, you loose. One argument is about hot rodding the other argument is about economy. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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  #20  
Old 03-30-2005, 08:51 PM
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Re: 6MM AI or 6MM - 284

So Brian you are trying to tell me that a 6mm AI barrel will out last a 6-284 barrel by more the a couple of hundred rounds? Can you explain that when you have to fire form cases with probably a charge of some where around 46 grains. So lets say you fire form 100 cases using 46 grain charge that is 4600 grains of powder you just ran through your bore just to form cases. Now you shoot 100 rounds with a 6-284 lets say with a 54 grain charge. Thats 5,400 grains of powder. Now that your cases are fire formed you shoot a another 100 rounds through your 6mm AI at say 50 grains. Now you have 200 rounds down the bore and 9,600 grains of powder something doesn't add up here now does it? Your are shooting more powder down the bore and also more bullets in the same bore DIA so I would like to know how you say it will get better barrel life? I am not trying to start a fight but something is not making sense to me with the argument the 6mm AI will have longer barrel life then a 6-284? I am curious on how many rounds did you have through your 6-284 and did you shoot P-dogs with it is my next question? As for the comment about 70 grain bullets I do not know what you had for a setup or what powder you were using. The rifle I have will shoot 80 grain bergers at 3890fps with accuracy and good case life I would like to see a 6mm AI come close to that. I also said a 6-284 shines with bullets over 85 grains.
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  #21  
Old 03-30-2005, 11:52 PM
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Re: 6MM AI or 6MM - 284

Well this isn't brian, but as a response to your question how is fire-forming wear out a barrel in the 6mmAI any faster than in a 6mm-.284 that you fire-form the brass in? If you use cream of wheat it does not wear out the bore at all as it does not use a bullet to fire-form. Did you know there is another way to fire-form not using the rifle to do the same task? Questions anyone? [img]/ubbthreads/images/graemlins/confused.gif[/img]
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