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6.5-06 AI 120gr Swift - Loads??

 
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  #15  
Old 04-12-2012, 10:30 PM
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Re: 6.5-06 AI 120gr Swift - Loads??

Dan,

I am using Lapua Brass, 30-06 necked down, then fire formed, neck turned and twice fired and annealed. Federal 210 primers.

I have H100V and 7828SSC to try when I get replenished Swift bullets.

I may try one of these with 140 bergers just to see if the rifle will stabilize them. The velocities I was getting were running between 70-100 fps better than what the data was estimating it would, so in my whacked out logic, it might work.

I may also see if the Hornady 129 interbonds do better than these Swifts for accuracy.

Interesting that you also hit an accuracy node at 3200. I think I can work backwards and save some legwork as it seems to be a trend. One data point is a dot, two is a line and three data points are a trend
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  #16  
Old 04-13-2012, 12:14 AM
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Re: 6.5-06 AI 120gr Swift - Loads??

Aldon,

You are certainly using the best brass available. lapua brass can handle higher pressures than the Winchester and Remington that I was using. this can be a good thing or it can be a bad thing in the same breath....3200FPS is pretty close to the max velocity for this bullet weight. It's also right at where the cartridge seems to pressure out. going past that seems to be running that fine line.... I'd start messing with seating depth to see if that would help the accuracy any.

I really hope that the 140g Bergers will shoot in your rifle. I went through 2 full boxes before I gave it up. Your "whacked out logic" is really not that out of line, by all serious reasoning and logical thinking you should have enough velocity to overcome the twist difficency. I thought the same thing. I guess that my rifle (also a Remington 700 with a 26" Shelin select match bbl) just wouldnt do it. I spent 2 years banging my head against the wall (I'm stubborn that way) trying to get them to shoot. I then bought my first box of 129g Hornady SSTs and the rifle grouped them with every powder charge I tried. The tightest group being with the RL-22. It liked them so much that I went out and bought 1000 bullets. I guess that we're committed to that bullet for a while.

If you continue with H4350, you may want to use Federal 215 magnum primers or CCI 250 Magnum primers as they help mitigate the possibility of inconsistant ingnition, or hang fires. They may also help tighten up that .75 MOA group.

Keep us posted, Sounds like lots of fun.

later,

Dan
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  #17  
Old 04-13-2012, 03:11 PM
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Re: 6.5-06 AI 120gr Swift - Loads??

Quote:
Originally Posted by Aldon View Post
Dan,

I am using Lapua Brass, 30-06 necked down, then fire formed, neck turned and twice fired and annealed. Federal 210 primers.

I have H100V and 7828SSC to try when I get replenished Swift bullets.

I may try one of these with 140 bergers just to see if the rifle will stabilize them. The velocities I was getting were running between 70-100 fps better than what the data was estimating it would, so in my whacked out logic, it might work.

I may also see if the Hornady 129 interbonds do better than these Swifts for accuracy.

Interesting that you also hit an accuracy node at 3200. I think I can work backwards and save some legwork as it seems to be a trend. One data point is a dot, two is a line and three data points are a trend
Hi Aldon.....you are probably getting higher velocities than the manual because Lapua brass tends to be thicker (less capacity) and you are getting higher pressures....Rich
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  #18  
Old 04-13-2012, 03:31 PM
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Join Date: Feb 2012
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Re: 6.5-06 AI 120gr Swift - Loads??

I'd back off to the "starting load" for a standard 6.5/06 if you go with a magnum primer. Especially using the wonderful Lapua brass. As earlier noted it does tend to have less internal capacity. I tried W867 Surplus Powder (similar to AA8700) and needed the magnum primer to get that sawdust smoking. That stuff is wonderful in my 30/338 win mag with the 230 berger but i digress thats another thread. I had to reduce the powder charge by 2 full grains to get to a load that didn't have pressure issues when going from a federal 210 large rifle primer to the federal 215 magnum rifle primer. Velocity wasn't awesome or even anything to write home about with the 140 Berger vld or the 139 Lapua moly scenar but the ES was 15. As usual ymmv.
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  #19  
Old 04-13-2012, 06:18 PM
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Re: 6.5-06 AI 120gr Swift - Loads??

Fed 215 did nothing for the 6.5AI load today.

I did try the same thing in my 280 hunting load that I have been simultaneously working up and it tightened the grouping just a bit. Already to good now borders really good.

Thanks for the input guys.

I will be careful with pressures due to brass choice as suggested.
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“When a long train of abuses and usurpations, pursuing invariably the same object evinces a design to reduce them under absolute despotism, it is their right, it is their duty to throw off such governments. …” Jefferson

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  #20  
Old 04-16-2012, 11:41 AM
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Re: 6.5-06 AI 120gr Swift - Loads??

I tried the Berger 140's today and they worked well. I hit two accuracy nodes using H100 at ~ 2600 fps and at ~ 2800 fps but I am just starting to see pressure signs at 2800.

I may try H100V and see if my velocity goes up a bit, but for my purposes, 2800fps is ok if not the ideal.

The rifle is shooting less than .5 moa when it hits the nodes and I may do a bit better by tweaking the seating depth.

Also, these are jammed .001

So if accuracy improves by juming, my pressures should decrease a swell.




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“When a long train of abuses and usurpations, pursuing invariably the same object evinces a design to reduce them under absolute despotism, it is their right, it is their duty to throw off such governments. …” Jefferson

We are very close to this point now.
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  #21  
Old 04-16-2012, 10:10 PM
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Re: 6.5-06 AI 120gr Swift - Loads??

Quote:
Originally Posted by Aldon View Post
I tried the Berger 140's today and they worked well. I hit two accuracy nodes using H100 at ~ 2600 fps and at ~ 2800 fps but I am just starting to see pressure signs at 2800.

I may try H100V and see if my velocity goes up a bit, but for my purposes, 2800fps is ok if not the ideal.

The rifle is shooting less than .5 moa when it hits the nodes and I may do a bit better by tweaking the seating depth.

Also, these are jammed .001

So if accuracy improves by juming, my pressures should decrease a swell.




What is your barrel length? my 26" barreled 260 shoots 139gr & 140 gr bullets at 2830with h4831sc.

By the way my experience has been that velocity drops a bit when shooting the same load slightly jumped, versus jammed
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