MSwickard
1 post
Sep 08, 2004
7:19 PM
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Hello all:
I'm a short range BR shooter: Hunter Class and Varmint Classes. My question first concerns how critical is it to turn necks for the 1K game. Secondly, for a first barrel what is the best way to go: std BR, Improved, 6.5's? I have my Sporter which is a Panda with a PPC bolt face. I will probaly just rebate the rims on the cases. I am really just planning on getting another bbl chambered up to make a 11-13.5 lb rifle.
Any suggestions would be appreciated.
Thanks
Mike
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DANTEC
Charter Member
8 posts
Sep 08, 2004
11:00 PM
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If you stay with PPC bolt face that not a broad choice
6 PPC imp with 90 gr / 95 gr bullet can reach 1 K
or
new 6.5 Grendell ( that work at 600 yards ) but at 1 K ?
or
use 6.8 SPC from rem , neck down in 6 mm and use 90/95 gr bullets , bigger powder capacity can help at 1 K
but most of these option are not the best , better perhaps to purchase a spare bolt ( 308 bolt can extract PPC )or make your bolt face open and go in 6 BR IMP or 6.5/08 ( 260 rem )
good shooting
DAN TEC
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BountyHunter
Charter Member
7 posts
Sep 09, 2004
5:16 AM
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Mike
1K BR has the same issues with uniformity that the short range game does. So neck turning at least to clean up the necks is usually recommended.
The standard used to be .290 for the 6.5 and now it is leaning towards the higher end at .296 with people finding that thinner necks are easier to knock out of align.
Key in the 1k game is quality of brass but most important bullets. Most 1k guys measure base to ogive, some trim metplats and now the big thing will be going to flatbase bullets like the short range game.
We have the 187 BIB in 30 cal with 12" and 13 twists (3050-3500 fps)
and the 6.5 135 and 140 gr Clinch River with 9 twists (2900-3050 fps)
Need a high BC bullet (at least .500) going at least 2850 fps by most standards.
However that depends on your local range. If you shoot at the Ohio (Thunder Valley) with 3 large gulleys going crosswise and always wind, higher BC and move FPS is better.
Herman
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GLN
5 posts
Sep 12, 2004
8:21 AM
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Mike
I would give Kelby's a call they can modify your Panda bolt face to handle both PPC and BR case. They do this for a very small fee.
I will be building a 6BRX this winter. Less expense can use regular BR dies. I don't feel you need the extra 100 to 150 fps for 600yd shooting. If you do 1000yd yes go to a Dasher. I can get 3250 with my 6mm now.
Mike did you get the team trophy home OK. Gary
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MSwickard
2 posts
Sep 13, 2004
4:41 AM
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Thnaks all for the info.
Gary, the team trophy made it home safe and sound to be returned next year in KS. Still have to get the plates engraved, but haven't recieved the scores yet.
I'll e-mail you when I have a little more time to discuss 1k shooting.
Take care
Mike
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DANTEC
Charter Member
11 posts
Sep 13, 2004
11:42 AM
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as neck turning no need very thin neck as 0.262 , a 0.269 can allow to just kiss to remove high spot
I mostly use 0.471 reamer and find no big improvement with my 0.267 neck chamber
good shooting
DAN TEC
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mikecr
4 posts
Sep 13, 2004
4:50 PM
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Is this great un-turned performance happening with the bullet into the lands or off the lands?
I've always had higher runout on the bullet when brass consistancy exceeded .0015".
Seated off the lands a ways, runout effected my groups. So I turn the high spots.
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DANTEC
Charter Member
12 posts
Sep 14, 2004
2:03 PM
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I agree with you but in 0.271 you can calibrated your neck by neck turning as sson as you dont remove more than high spot that work fine , few 0.001 more in neck clerance doesnt kil accuracy
another way id to neck turn ( ligh turn ) shoot once and after neck size on 2/3 of neck lenght that allow prefct chambering IF you bump each 4 or 5 shots to avoid to hard blot close .
good shooting
DAN TEC
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lynn
Charter Member
8 posts
Oct 01, 2004
7:17 PM
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In my opinion the Lapua 6br brass is so good that many are getting away with the no-turn necks.I still prefer to neck turn and not take any chances at starting the bullet off center.With a 0.268 neck you get full clean-up of the case neck plus you have enough brass left for heavy neck tension.The heavy neck tension will also help lower your extreme spreads.Neck turning is both fast and easy so why take a chance.
Lynn
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Al Nyhus
1 post
Oct 04, 2004
6:38 PM
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Hi Mike. Before going any further, let me say "congrats" on some fine shooting at the NBRSA Hunter Nationals this year.
Mike, I would definitely set the chamber up for a tight neck. My SGR built 6BR has a .265 neck and I personally think the .265 has some benefits over the 'standard' .262 neck dimension common to many BR's and PPC's. With a .265 chamber neck, the necks are just enough thicker to allow an effectively 'tighter' neck tension w/o excessive sizing.
What I mean is that a .010 thick neck sized with a .002 under button yeilds similar 'effective' neck tension as a .0085 (common thickness with a .262) neck sized with a .003 button. Since many in the longrange game find neck tension to be a useful tuning aid, I believe a chamber with a .265 neck diameter (and up to the .268 area) may offer some latitude in this area.
As for pure accuracy, I believe the .271 (no turn) chamber neck diameters work well when the bullet is jammed, as the jamming process tends to center the bullet into the lands. When you start jumping the bullets is when you can see the accuracy differences, IMO.
Take care and good shootin'. -Al
Last Edited by Al Nyhus on Oct 04, 2004 6:41 PM
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