204ar
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Posts: 70
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Post by 204ar on Jul 9, 2012 17:55:18 GMT -8
I thought I better add to the lonely 243 Win board! I'm pretty excited as I ordered a 22", standard profile 1-9 twist 243 barrel to rebuild my dpms. Putting a dpms carbon fiber ff tube on it and an Ace stock, should be managable to carry and deadly accurate! ;D
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Post by blopez50 on Jul 9, 2012 18:03:46 GMT -8
Should be awesome man!
What are you planning on shooting out of her?
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204ar
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Posts: 70
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Post by 204ar on Jul 9, 2012 18:34:18 GMT -8
Well, I'm hoping it will shoot everything up to 105 amax's. Did you get your SD 243 sold yet? I am just replacing the R25 barrel on my upper, that thing is a copper mine, though it does shoot almost moa. But not good enough, so I'm putting together what I wanted in the first place! I'm not sure what I'll end up wanting to shoot thru it. Probably some good old 100 gr Hdy's for deer, or 75 or 87 gr vmax for the coyotes. Then stoke it with the 105's for some steel shooting out to 850 yards if it's accurate enough. (Haha that's supposed to be seen as a challenge BHW smiths )
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Post by WPD4323 on Jul 10, 2012 7:25:24 GMT -8
Best of Luck with you project as I to am a 243 Fan and have been right where you are. Keep us all posted on your progress and share what you learn, no sense reinventing the wheel!! I think your on the right track for what little I know!!! I am getting ready to order a 243 BHW barrel for another 243 project myself.
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204ar
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Posts: 70
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Post by 204ar on Jul 10, 2012 19:15:27 GMT -8
Thanks I'll keep you posted on progress and post pics when I get it done. I got all the parts except the barrel and possibly an adjustable gas block. I think the stainless jp lo-pro would look sweet, but I like the price of the Keis a lot better.
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204ar
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Posts: 70
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Post by 204ar on Jul 30, 2012 17:58:56 GMT -8
Ok I'm a little confused now. I called Stacey today for a progress report (I'm worse than a little kid). She said it was chambered but didn't pass inspection bc it was the wrong twist. Also it sounds like Andy said that 1-9 is not a good choice for the 243. But I see all the 6x68's are 1-9. So not sure now which way to go, I really was hoping for a do-all barrel, from 58's possibly up to the 105's, with emphasis on the heavier ones.
Why is 1-9 the right choice for 6x68 but not 243? I realize the 243 should be faster, but probably not that much. Someone educate me! Will a 1-10 with the poly rifling work for the heavies?
On a better note, I got my JP silver stainless lo-pro gas block. Man they do a nice job on them, it should look outstanding on that satin barrel.
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Post by GLSHOOTER on Jul 31, 2012 8:48:19 GMT -8
Ok I'm a little confused now. I called Stacey today for a progress report (I'm worse than a little kid). She said it was chambered but didn't pass inspection bc it was the wrong twist. Also it sounds like Andy said that 1-9 is not a good choice for the 243. But I see all the 6x68's are 1-9. So not sure now which way to go, I really was hoping for a do-all barrel, from 58's possibly up to the 105's, with emphasis on the heavier ones. Why is 1-9 the right choice for 6x68 but not 243? I realize the 243 should be faster, but probably not that much. Someone educate me! Will a 1-10 with the poly rifling work for the heavies? On a better note, I got my JP silver stainless lo-pro gas block. Man they do a nice job on them, it should look outstanding on that satin barrel. Let say that we all have our own ideas at times............ The 1:10 will handle the heavies. The 1:9 will too. As to which is better? I think you will do fine with a 1:9. The fast twist just gives you a few more options to try. It will not degrade the accuracy one bit IMHO. If I were ordering one that is the twist I would go for.Also, If it were me , I'd actually go for a 1:8 but BHW does not have one yet. They need more input from the buying public.......hint, hint.......... to make the 1:8 available in ALL the 6 MM's and that would be a good thing for us. Greg
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204ar
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Posts: 70
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Post by 204ar on Jul 31, 2012 20:07:10 GMT -8
I talked to Andy for a little while today and we've got it decided. I'm going to try the 1-9, and see how it shoots. He's concerned it will overspin bullets at the speed the 243 generates, but hadn't tried it so wasn't for sure. He said I could do the R&D for them and see how it does! Looking forward to it, should only be a couple more weeks according to Stacey!
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Post by GLSHOOTER on Aug 1, 2012 15:49:29 GMT -8
I talked to Andy for a little while today and we've got it decided. I'm going to try the 1-9, and see how it shoots. He's concerned it will overspin bullets at the speed the 243 generates, but hadn't tried it so wasn't for sure. He said I could do the R&D for them and see how it does! Looking forward to it, should only be a couple more weeks according to Stacey! I've been shooting long range matches and many guys are shooting 1:8 6 MM's. In 243 and the 6 BRX. They move those big bullets right along and have no issues. The spin can destroy a bullet through over rotation like the old SX varmint bullets that could only handle 2800 FPS. The new light bullets like the 58 VMAX are designed to handle velocity and spin up the wazoo and you won't blow one up. As you shoot the big 243 bullets your velocities will be lower than the little guys and you have no danger of that. In reality you can over stabilize a bullet. I've heard it said it was possible but I have never seen any data, pictures, target etc, to show what happens when you "over stabilize. Maybe I'm being a bit skeptical but I would like to see the actual thing proven and not theoretical math being handed me. EDIT 8-2-12I got very curious about this over-stabilization and finally decided to get off my tail and look into it. It is possible and I found several sources that spoke to it. Here is one: www.nennstiel-ruprecht.de/bullfly/fig15.htm Now that I had found this I got very curious as to does it happen in the real world and should I even think about it. I placed a call to the Sierra Tech guys and was told that yes you COULD over stabilize and that the effect was just as the illustration in the article said. The bullet will tend to fly nose up and will not drop down following the normal ballistic curve of tip down. It will rotate around the center of gravity that tends to be toward the heel of the bullet thus keeping the nose up. It will degrade the BC to some extent as it is not flying on a nice even keel through the air. He felt that strong head winds into the bullet could exacerbate the problem but that was a long shot in his opinion as to real world occurrence. He also said that in reality most bullets were "over stabilized" but that at the normal level that we shoot these bullets it is not excessive and, proven by match results, does not degrade the accuracy of our ammunition to make it ineffective. He further stated that common twist rates of 1:7 and SLOWER would not do harm to accuracy in any of the 243 loadings we would use in the 243 LBC or 243 Winchester. He did touch on the blow up effect of a thin jacketed varmint round at an excessive high rotational speed but that is a construction issue and not truly a ballistics issue. He also felt that regarding the 6 MM in general that nothing over an eight twist was really needed as the bullets just weren't that long. He also felt to gain optimal down range usage of the 6 MM that the 1:8 twist was the way to go if one had a choice. Given an choice he said he would always pick a faster twist if it were available to give more flexibility in his choices as the fast twist will shoot the light bullets but that the slower one would, in fact, limit your usable projectiles to some extent. END EDITSpin is spin. A BHW barrel is SLICK and will get you higher velocities. A 1:9 twist or a 1:8 twist will come out spinning the appropriate rate of a 1:9 or 1:8. Having less resistance there will be an increase in rotational speed but, I believe, the increase will be inconsequential from the shooters end. I'll be running some hot 6 MM's that are light weight through my 6X68 and I'll see what uber-fast does to them. Congratulations on your choice of barrels and I am excited to see how it shoots. Greg
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204ar
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Post by 204ar on Aug 10, 2012 12:42:34 GMT -8
Good info there! Thanks for doing the research.
I got the email today, the 1-9 barrel has shipped out today! ;D I thought the confusion might delay things a bit, but it's on it's way!
I also found a 308 barrel in stock at Rainier and got that this week, put it together last night, so I'll have twin AR's, both with satin BHW barrels. In fact I'm going out to the range now to shoot the 308 some more, I put 20 rounds thru it yesterday, and it ran flawlessly. I made an adjustable gas block out of an old DPMS one I had laying around, and it worked perfectly to tune the gas. My scope was moving around, so only got a couple good groups. I've got a proven scope on it now, so we'll see what it does.
I'm so stoked about these new uppers!
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Post by GLSHOOTER on Aug 10, 2012 16:59:12 GMT -8
Sounds like you are on your way to Shangri la!! Congratulations. Greg
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