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500 round update LSR

 
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  #1  
Old 06-11-2005, 06:52 AM
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Join Date: May 2004
Location: MD.
Posts: 225
500 round update LSR

500 rounds down the Broughton tube easy to clean and it picked up a few fps. The rifle action is slick as can be.
Just been sitting back listening to the 6.5 chatter and takeing notes. So I figured it was time to try a few things / new loads.
H4831 has been great but causes flyers
H4350 is great but hits pressure early
R-22 temp sensitive? dirty? who cares it shoots!
The gun was built to be a tough tactical 1/2 MOA gun. Then it started. I only have a local 200 yard range so I got a little nuts seeing how good it could shoot.
With the last loads the gun has held 1/2 MOA or better at 200yards for the last 30 rounds, with cold and clean thrown in also.
Ric will post pics.
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  #2  
Old 06-11-2005, 08:04 AM
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Join Date: Oct 2004
Location: Northamptonshire England
Posts: 676
Re: 500 round update LSR

Hi Rimfire,
I noticed the same pressure problem with H4350 last week whilst trying to get a 185grn Scenar to do 3000fps out of my 24" 300wsm.

A mid range charge of 62.5grns gave 2850fps with no pressure signs but a 1 grain increase had me knocking the bolt up with a rubber mallet. Sierra's max charge was 66grns.

A switch to 70grns of RE 22 eliminated the pressure problems but no increase in velocity.
71grns took the velocity up to an average of 2894fps again without any pressure signs but at this point the experiment was abandoned as a 71.5 grn charge was starting to travel up the case neck.

Acuracy with the lesser load of H4350 was sub 1/2 moa as was the 63.5grn load.
Acuracy with RE 22 went off to 3/4 to 1 1/4 moa for five 5 shot groups, maybe in my gun this cartridge works at its best on or very close to maximum pressure.

A compressed load of 72.5grns RE 22 had 155grn Scenars travelling at 3190fps with no signs of pressure but again poor accuracy in the 1 to 1 1/4 moa bracket.

Ian.

"I mean't to shoot the pike but the duck got in the way"
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  #3  
Old 06-11-2005, 09:08 AM
 
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Re: 500 round update LSR

Hey Rimfire...Great post. I've stuck with the H4831 so far. Not sure I'm brave enough to try a different powder. I think I have some R-22 handy as well as the 4350. Who knows. I might load some up and bring them to PA??

Still going?

Joe
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  #4  
Old 06-11-2005, 10:31 AM
 
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Re: 500 round update LSR


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  #5  
Old 06-11-2005, 11:06 AM
 
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Re: 500 round update LSR

OK Ric

How bout some details on the r-22 loads...Any special caase prep? [img]/ubbthreads/images/graemlins/smile.gif[/img] I cant read the notes you wrote on the targets.

I assume this is a 6.5-284 from the man right?

Joe
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  #6  
Old 06-11-2005, 02:06 PM
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Join Date: Oct 2004
Posts: 723
Re: 500 round update LSR

how does your 300 wsm accept heavier /longer bullets ( 200 + )?
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  #7  
Old 06-11-2005, 03:26 PM
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Join Date: Mar 2005
Location: Wyoming
Posts: 198
Re: 500 round update LSR

nice rig and very nice shooting ric
__________________
"I am a stone. I do not move. Very slowly, I put snow in my mouth and he won't see my breath. I take my time. . . I have only one bullet. I aim at his eye. Very gently, my finger presses on the trigger. I do not tremble. I have no fear"
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