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?
alliant/reloader powders
- Thread starter pjracer
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gbp
Well-Known Member
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......
MagMan
Well-Known Member
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).
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).
winmagman
Well-Known Member
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
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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Turpentine
Member
- Joined
- Feb 20, 2012
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- 7
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
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
Lefty7mmstw
Well-Known Member
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.
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.
