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US 869 Lot to Lot differences

 
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  #1  
Old 11-26-2006, 11:41 PM
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US 869 Lot to Lot differences

I purchased a 1lb can of US 869 as a start for my 270 AM. The store had that 1lb can plus 2 8 pounders. I figured I start small and work up in canister size.

The one pounder stuff shot great. Good velocity and super accuracy. I burned that up pretty quick.

Bought the 8# canister that had a lot number tag on it. I did a dumb thing and wiped off the lot number of the 1 LB can. [img]/ubbthreads/images/graemlins/crazy.gif[/img]

The two lots sure are different. I'm using as much as 3 grains less powder to get the same velocities as the 1# lot.

SDs and ESs are all over the place and the damn stuff stinks when you shoot it. I do my load development shooting through a three plastic barrel silencer gizmo which confines the muzzle blast. I stuck my nose in the smoke leaking out and the ammonia smell about knocked me down. What's with this?

Also at the range the smoke after the shot goes about 15-20' on either side. The design of the brake is really apparent. [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Old 11-28-2006, 12:30 AM
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Re: US 869 Lot to Lot differences

That is dissapointing. I just got done playing with a 1# can and was about to buy a 8# can. 3 grains is more than I want to adjust unless it is more as I have a hard enough time trying to fill the case safely without being too hot. 869 was showing sighns of promise. Almost full cases, decent velocity and decent accuracy. I think Rl-25 is still going to be my go to powder.
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Old 11-28-2006, 12:20 PM
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Re: US 869 Lot to Lot differences

That is really too bad, it looks like the lot in the one pound cans was showing promise for the .338 edge too. If anyone hears any more about this please keep us all posted, I have a new 1# can and will post my results. [img]/ubbthreads/images/graemlins/tongue.gif[/img]
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Old 11-28-2006, 04:10 PM
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Re: US 869 Lot to Lot differences

I guess i got lucky, i went with the 8# jug to start with. But in the 338 Snipe-Tac rifle shooting 140+ grains it won't last long either. In the huge case capacity rifles i like the WC872 much better. The BMG-50 works very good as well, little hotter. This is with the 300gr MK bullet.

Dave
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Old 11-28-2006, 08:20 PM
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Re: US 869 Lot to Lot differences

BD,

I'll wait for your experience when you change lots, if you do.

I'm shooting both a 338 RUM w/99grs and 300 SMKS and the 270AM w/a little less powder.

Some canisters don't have the lot number on them. My 1# can did but in trying to determine if it was or wasn't a lot number I rubbed it with my thumb before I wrote it down. [img]/ubbthreads/images/graemlins/mad.gif[/img] [img]/ubbthreads/images/graemlins/mad.gif[/img] [img]/ubbthreads/images/graemlins/crazy.gif[/img] The last number was a 43 which is the last number on the 8#'r I got but they sure seem different.
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Old 11-28-2006, 08:40 PM
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Re: US 869 Lot to Lot differences

The lot #s on the 1# cans used to be on bright yellow sticky tabs. Kinda like price tags. They were bad about falling off [img]/ubbthreads/images/graemlins/frown.gif[/img].
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  #7  
Old 11-28-2006, 08:51 PM
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Re: US 869 Lot to Lot differences

Look on the part of the label where it says "CAUTION".

Halfway down along the extreme left edge are some vertical numbers
They might be "1112305" followed by "43"
or "1020706" followed by "43"
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