RL-22 - A "Temperature Sensitive" Powder

[Broncazonk]

I keep reading about how "temperature sensitive" RL-22 is. Okay, but what does that mean in practical terms? What happens to a round loaded with RL-22 at 75-degrees F. vs. 35-degrees F. for example?

Second question: I use a lot of IMR 4831 for the Rem. 7mm Mag. Is there anything new (a new powder) out there that's rocking everyone's world in 7mm Mag?

Bronc

 

[nastynatesfish]

I never noticed it being unstable in my rem mag but that was also before I really started in on accuracy loading. I use H4831sc now and love it. I hear good things aboutvH1000 too. I run 140 vld and 162 amax in mine

 

[swed6.5]

The more you believe that someone says theres a problem with sensitivity it might also be that there load wasn't tuned right to begin with. Ive seen people comlain even varget is too sensitive, ive heard some say the same about V.V. powders, if your shooting somewhat on a regular basis and ree tune every time you change a component or powder lots you should be ok
good luck

 

[jsimonh]

I shot it with good results in a 7mag, but didn't use it long enough to see a difference from winter to summer. The internet hype about being temp sensitive got to me and I switched to H1000. Still have some left. I'm a lot more experienced reloader now and wouldn't have a problem using it in a target gun.

 

[jonbearman]

Works ok for me in 6.5x55 swede.I know it isnt a magnum but havent noticed any variations yet.Maybe the complainer let his rounds lay in direct sunlight.

 

[XTR]

Temperature sensitivity and whether or not you perceive it will depend on your application and load.

If you work up a load that is at or near max, at 45 degrees, then try to fo out and shoot it in 98 degree heat you may find that yoiu are blowing primes(by max I mean max in your bullet chamber combination, not max on published tables) If you are the average hunter and you're shooting for the vitals on a deer out to 200 yards it will make no difference at all, but if you are shooting in tactical matches and you are trying to put the first shot on a 1/2 sized IPSC steel at 562 yards then you may want something that is going to give you more consistent MV across a wide range of temperatures.

Do some searching, someone out there either here or on Snipers Hide did a test shooting the same loads of different powders at different temperatures and plotted the changes in MV. I don't know if it included RL22 but it will give you some idea of the effects.

I've blown primers once with Varget, my bullets sat in the truck for 2 hours while I pulled targets at a match. The next match I shot I blew 2 primers.

 

[yukonal]

I keep reading about how "temperature sensitive" RL-22 is. Okay, but what does that mean in practical terms? What happens to a round loaded with RL-22 at 75-degrees F. vs. 35-degrees F. for example?

Using almost the exact temps you listed...6-1/2" left and 1-1/2" low at 300.

 

[Broncazonk]

Using almost the exact temps you listed...6-1/2" left and 1-1/2" low at 300.

Yeesh--that's all I need to hear. Wow-o-wow. What's the story there?

Bronc