Building a rifle...

Well after looking around on 6mmbr.com the 6BR looks better all the time, especially since I can get brass without forming it. I saw that it has trouble feeding out of a magazine /ubbthreads/images/graemlins/confused1.gif Looks good though, and isn't that far behind the 6x284.
 
I think once you have a 6mm284 you wont want another round. If you build it right you will be very satisfied. I would recommend finding a good gunsmith to do the rechamber. Here is the load data I use H4831@ 51.2 gr and 70 gr nozler. Make sure you get a barrel with a 9 or 10 twist to it. Ill try and upload some pics of mine tomorrow. Good luck with the build let me know how it comes out.
 
Some of these guys give advise and they just don't get it.

First of all, a 6 br usually just punches a hole in a chuck at rages of 300 yards or more, they crawl off to an awful death.

If you are going to shoot any caliber on chucks, pick a bullet that is made to expand quickly on flesh, either a ballistic tip, blitz king, or V max....design the cartridge around the bullet, not vise a virsa.

It is real heart breaking to shoot a hole through a chuck just to see him waddle off to die a slow death...maybe you don't care. Most of the target bullets just punch holes through a small animal...they deserve better.

The ranges that you are going to be shooting will dictate a lot of your choices in cartridges. The 75g V Max and should be one of your first choices in the 6/284. The 243 AI will shoot the 75's at 3800 with 1/4" accuracy in a 29" barrel with Win 760. The 6mm AI will shoot the same bullet at over 4000 with extreme accuracy.

In today's world, many guys look at the Highest BC bullet and go for it. The 87g V Max is a good target bullet, but fails in the field at times at 3500 fps on chucks when the ranges got 400+. In your 6/284, the 87g V Max with a heavy load of R#19 @ 3800 will be a winner, and with out a doubt the 75g V Max will T off a chuck 15' or more.

Just forget the 6 BR, I have had a bunch of them. For chucks you need horse power. You don't have 4 shots to get zero'd in on a chuck before he is gone, you get one shot and one shot only. On a rare occasion, you will get a second shot, but that is the exception to the rule. With the trajectory of a 45/70, you just can't deal with taking "sighter" shots with long VLD type of bullets that do not expand at all.

Get a cartridge with some huge balls hanging from it. 6mm AI has the same ballistics of the 6/284 without all the expense of the brass and uses less powder. I shoot the 70's at 4150 from a 26" SS barrel in formed brass from a 6mm AI, shooting 1/4-3/8" groups.

I shot Customs in 6mm Rem on chucks for a long time with a heavy load of IMR 4064 with the Sierra 80g Single shot pistol bullet at 3600 fps, which did a great job.

Good luck!
 
Will do bkhcj8, is it pretty easy to make your brass for the 6mm284? That's my only drawback.

Man that was a lot of info Ack, so now I have more questions /ubbthreads/images/graemlins/smile.gif So it looks like the 75gr. V-max is the way to go. But now I'm back to should I go with the 6mm284, or the 6mm AI, or the 6.5/284. It doesn't look like the 6.5 has the bullets for launching chucks, so that might be out /ubbthreads/images/graemlins/confused1.gif What are the pros and cons for both cartridges? Thanks for all the help.
 
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You dont have to form the brass just use a 6 284 die with a 6.5 284 case and it will size it easily. Once you have sized it with that die and need to reload the next loads are just like loading a regular shell because the brass is fit to a 6mm284 then and no longer a 6.5 284. Just always rember and let anyone know that uses that brass that it is a 6 284 and not a 6.5 284 like the case will be stamped. Put that in the wrong gun and the outcome wont be good.
 
go 6x284 like was said above once you have one thats the only 6mm you will want. No fireforming brass and dies wont break the bank.
 
V2,
You've got enough info to keep your head spinning for awhile! I'd personally do the 6mmAI. I'm not a huge fan of fire forming, but you can be killing stuff while you fire form all the cases you think you'll need /ubbthreads/images/graemlins/grinning-smiley-003.gif If the metal work was done right, accuracy will still be excellent from the standard 6mm brass while you're fire forming and killing chucks, so you really lose nothing.
About actions: unless you have a Remington donor action, or find a very cheap rifle to cannabalize, the money spent in a complete blueprint will take you close to what you'd spend on something like a Stiller, or similar action, when all is said and done. The resale value of a worked over Remington action will not approach that of one of the custon actions. On the other hand, there are a whole lot of really good shooting Remingtons that have just had the front receiver squared and lugs trued (and not had the threads recut, bolt sleeved, etc) and barreled.
Decisions, decisions! What's a fella to do /ubbthreads/images/graemlins/smiliesmack.gif
Good luck!
F1
 
Yup your right Flyrod, and you not helping any /ubbthreads/images/graemlins/smiliesmack.gif /ubbthreads/images/graemlins/smile.gif I think I'm going to go with the 6/284, seems that's what everybody likes. Thanks for the help on the caliber guys, now for the other questions /ubbthreads/images/graemlins/smile.gif
 
Well here's my plan. I'm going to get a used, maybe new, Remington SPS Varmint in .243 winchester. Then I'll probably use it for deer this year. Then I'll get it rechambered for 6/284. I'll sell some coyote hides, maybe a bobcat or two and grap a McMillan A-5 stock in that pretty blue swirl on black color /ubbthreads/images/graemlins/smile.gif Get a Nightforce 20MOA base and some Badger Ordanance rings. Kill some more bobcats and coyotes and grab a Leupold VX-III 8-25x50 LRT with the varmint hunters reticle. Kill some more bobcats and coyotes and put in a 1 1/2 oz - 4lb Jewel trigger. By this time I'll have burnt out the old barrel and I'll slap on a Pac-nor or Krieger or Lilja barrel and that should complete it. Estimated time of arrival 1 or 2, maybe 3 years, depending on the bobcat season /ubbthreads/images/graemlins/smile.gif What do y'all think?? Thanks for all the help, and if you have any more suggestions go ahead and throw them out /ubbthreads/images/graemlins/grinning-smiley-003.gif
 
I think that it would be a waste of money re-chambering the 243 barrel. Second, when you shoot a bob cat or fox with a 243, the hide is pretty shot up.

If you use the 6/284 or the 6mm AI, you should use the long action, not the short action. If you use the short action for either of these cartridges, there are serious issues in seating the bullet to touch the lands and still be able to get the bullet into the magazine.

As the leade grows in your rifle from shooting, you need to keep seating the bullet out further and further to maintain accuracy. If you can not "chase" the lands as the leade grows, you will have a serious decrease in accuracy.

Don't make the mistake that I did and use a short action on your first 6mm AI or 6/284.

by the way, I fireformed the 6mm Rem cases at 4050 fps using the 70g Ballistic tips shooting less than 1/2" groups using Win 760, formed loads were going 4150 (which was not the max) in my 6mm AI with a 26" barrel.

Good luck!
 
I'll be shooting the bobcats with my .204 /ubbthreads/images/graemlins/grinning-smiley-003.gif So what rifle should I get that's still 6mm ? Should I get a long action, action and put on a 6/284 barrel or...? Thanks.
 
I'll second everything ackleyman said.

The 6BR is a terrific cartridge but I don't take it chuck shooting. It's about velocity and there just isn't enough power for shooting them at distance. Or let's say, not enough power if you want something to happen other than knocking the chuck off it's rock. If you want to really enjoy doing it, there's gotta be enough oomph to make something happen when the bullet connects. Putting holes in paper with VLD match bullets at distance isn't anywhere near the same as shooting rockchucks where you want a bullet that does more than just drill a hole. And shooting paper targets at known distances isn't the same as shooting varmint targets. Higher velocity means flatter trajectory, and that's better than rainbow trajectory when targets can be at different distances from one shot to the next. Target shooters who are casual varmint shooters just don't seem to make the connection.

Don't screw with the 243 first and don't even mess with a short 700 action. Use the long one. All that's needed is an action, so I'd be looking around for an old 700ADL '06 with a beat up stock and blue wear on the barrel. The '06 is common and ugly is cheap, but even with a ratty looking gun the action can clean up very nicely. And it'll work smooooth from being cycled thousands of times.

About fireforming: If you decide to go with an Improved cartridge........There is no "fireforming" with AI cartridges, just shooting. Some people have the funniest ideas about things. In every one of my AI guns the fireform velocities are well beyond top-end for the parent cartridge and not far off what the formed case gets, with pretty much the same accuracy. Ackleyman's results are the same as mine and he knows this stuff very well....look at what he gets with a 6mmAI and ask yourself how much is being given up with "fireform" loads. Every time there's something about AI cartridges you'll always see the same nonsense posted about the "hassles" of fireforming. Don't pay any attention.
 
I guess some guns are different than others but both my 6mm284 are rechambered 700 243s and neither have issues with chambering a round from the mag. Thats why I advised to spend the money and time and send the gun to not a good gunsmith but a excellent gunsmith. I have about 2500.00 in the sendaro total and thats with a 100.00 harris extended biapod and a 800.00 leupold scope. I think I payed 700.00 or 750.00 for the gun so that leaves 800.00 to 900.00 for the gun smith work.I also had a ultra muzzell brake put on while it was at the gunsmith and I think that was around 200.00 of the gun smith fees. Like I said I have shot around 1500 to 2000 rounds 100s of yotes and 5 deer with this gun. I have loaded it the exact wat since day 1 and have not touched the scope since putting it on in 2002. It will still put a 3 shot group at 300yds touching eachother. Do whats best for you, but if your going to buld something to keep build it good so you arent spending more time with repairs than hunting. Last but not least decide where you are going to hunt and find out if that state requires a caliber larger that 24. Like Kansas. Im not sure if there any other states that require larger or not but if you want to go there and hunt you will need a different gun.
 
If I buy a .243 I'll check to see how far the lands are and how long I can seat the bullets in the magazine first.I haven't found any 30-06s that will work yet, but I haven't checked the local sporting goods store yet.
 
I hear good things about Remington's 243 factory throats. That would be where I'd start for a long-range varmint rig. 87gr V-max and 105 A-max would be first up to bat. I'm doing two Remington 243's right now, a sporter with SS factory take-off bbl and a lefty SPS Varmint for my wife. If it doesn't shoot, you've got a lot of options with a .473" SA700.
 
An ADL 270 is what pops up on that link.

You can indeed control throat length on a custom tube to allow overall lengths conducive to your magbox.
 


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