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6.5 x 284 SD problems

 
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  #8  
Old 04-12-2005, 09:47 PM
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Re: 6.5 x 284 SD problems

VH,

I load 140 vld Bergers with 50.0 grains of RL22 in a 30 1/2" barrel-8 twist. I seat the bullets about .010" into the riflings and I get 3115 avg and sd's of anywhere from 4 to 6 on a 10 shot string says my Oehler 35. For what it's worth.
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  #9  
Old 04-13-2005, 07:19 AM
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Re: 6.5 x 284 SD problems

Varmint Hunter,

Have you checked your neck tension consistancy? You said you are using prepped cases. Are these neck turned? This is generally not a problem witht he brass you are using but it can cause some velocity variation increases.

I generally like to use a bushing die for my extreme accuracy rigs. I used to een load them 0.050" long and use about 0.001" crush fit in the neck tension.

WHen the round was chambered it would seat itself to a consistant length from shot to shot.

This was for my extreme accuracy rigs. Now I just seat well into the lands as stated with about 0.002" neck tension and has worked great.

I have used several 3 groove Lilja barrels and have not had a problem. Most have been chambered for the 6.5-06 AI with bullets such as the 140 gr A-Max, 142 gr Sierra and Wildcat and the old 155 gr Sierras.

I have seen alot of guys get so hung up on extremely low spreads that they pass up some very quality loads. Shoot the loads at the ranges you will be using them and this will tell you more then groups at 100 and 200 yards.

Those long VLD bullets are just settling down at 200 yards. I would suspect you will be holding sub 1/2 moa groups at 500 yards, probably in the 1.5 to 2" range at 500 and even 1/2 moa out to 800 yards or so.

To be honest, with a VLD bullet, anything under 3/4" groups at 100 yards is worth testing at long range. You are getting this class of accuracy at 200 yards so back up and see what happens.

I also agree to put a bigger fire under those bullets. Often a harder thump in the rump will tighten not only your velocity spreads but also your groups.

Good Shooting!!

Kirby Allen(50)
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  #10  
Old 04-13-2005, 08:32 PM
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Re: 6.5 x 284 SD problems

FiftyDriver,

Been away for a few days. The Lapua brass is neck turned for a finished (loaded) neck diameter of .287". The chamber has a .290" neck.

I have been using about .002" neck tension with a set of Redding Comp bushing dies.

Loads are a bit light as I am still working up. Time for more horsepower and more rifling engagement. I'll keep you posted.

VH
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  #11  
Old 05-03-2005, 08:31 AM
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Re: 6.5 x 284 SD problems

any news??

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