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alliant/reloader powders

 
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  #1  
Old 10-16-2008, 01:24 PM
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alliant/reloader powders

worked up 2 loads in norma brass for in .280 rem and .270 win with RL 19 and 22 same lots in 90 degree weather all shooting 1/2 inch groups at 100yds.we had a cold front blown in overnite here in Texas and temps were in the 60s this morning. I took out same loads and each shot little over 1 inch group. I have heard these powders are temp sensative but by this much? made me question my scale, technique etc... should I switch to hogden extreme powders?
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  #2  
Old 10-16-2008, 01:43 PM
gbp gbp is offline
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Re: alliant/reloader powders

I do not have much experience with RL19 but I can tell you that RL22 is very sensitive to temp changes. I loaded up rounds for my 300wsm at what 'QuickLoad' indicated were slightly on the warm side but not excessive, by mid day I had to beat the bolt open to extract the round. Accuracy was great but......
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Old 10-16-2008, 01:44 PM
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Re: alliant/reloader powders

They went from 1/2" to 1" in both guns? With two different powders?

I'd try them again on a warm day.

I always start with the Hodgdon powders and if that doesn't work I follow up with Alliant and IMR (or whatever I have on hand).
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  #4  
Old 10-16-2008, 03:31 PM
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Re: alliant/reloader powders

yes they did it in both. was really weird. i loaded 6 rounds of each and shot same group in each gun.
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Old 10-16-2008, 04:27 PM
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Re: alliant/reloader powders

I shoot Re 22 in four different calibers, all loads are near or at max for the respective calibers. I've found all loads to be fairly consistent from 0 to 70 degrees, but from 70 to 90 degrees things can and do get a little scary.

Just like most powders, loads developed in the cold don't seem to do very well in real warm temps without a little tweaking.

Chris
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Last edited by winmagman; 10-16-2008 at 04:31 PM.
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  #6  
Old 09-12-2012, 12:21 AM
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Re: alliant/reloader powders

I just had the exact same thing happen to me with power pro 2000mr.
At 60 degrees, 5 shots into .42 inches. Went back to the range on a
90 degree day and shot four 3 shot groups. The best group was 1.3 inches.
The load wasn't close to max either at 50.8 grains with 150 accubond. Max is
51.5
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  #7  
Old 09-12-2012, 07:26 AM
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Re: alliant/reloader powders

I haven't seen any accuracy issues with rl powders themselves, and I've burned a bunch and buy them in kegs. I do see the barrel/ bullet relationship changing a bunch depending on temp..
I had a load with my 7stw shooting in the .3"s at 100 yards in the 50-70 degree range with rl25 and a 171 barnes match, it puked to 2" or more when it got over 90 degrees outside. This is where it went wonky; I grabbed some hunting loads with rl22 and 140 sierra's, and right after I shot a crappy group with rl25 and a 171 barnes in hot weather, the 140's drilled 5 into an inch at 100 with a boiling hot barrel.
It turned out it wasn't the powder, but the bullet that was having problems with the high temperatures. I'm staying with tougher bullets; the match bullets for critters thing isn't for me.
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