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I've worked-up a (book) max load with RL22 and 130 gr. bullets in .270 Win. If worked-up @ approx. 60 deg. should they be safe if used at closer to 100 deg.? Thanks, Tim.
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Joined: May 2007
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Campfire Greenhorn
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Campfire Greenhorn
Joined: May 2007
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I've had temperature issues with RL 22 in a couple 300 Win Mags. But these guys are very hot to start with. I'd work up loads at the temperature you will be hunting at. If at all possible.
Jim
Just my opinion ......and I have so few.
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Thanks Jim. I'll back off and work up the load again in another month or so. Tim
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Campfire Ranger
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Campfire Ranger
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The Aliant handbook say 60 grains is max with the 130 grain bullet, I have shot with some regularity 59.5 grains of RL22 in my 270, and on some days when it is 90 degrees outside. Why would aliant not put a warning in their handbook if RL22 is temperature sensitive?
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Joined: Nov 2005
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Campfire Member
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Campfire Member
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While some powders say the are temperature insensitive and probably are to an extent, the barrels, primers,cases,and bullets expand and contract with temp variance. I have on many occasions found a load to shoot differently with change in temp.I really see this change best in long range performance, say 300 yards and further,because it shows up more the farther out you get. Thats the reason 1000 yard shooters have to adjust each day due to conditions. Snipers in Irag have a 60 degree variance in temp from night to midday and find 3 to 4 feet of change in POI.
Last edited by rvp; 05/11/08.
SHOOT STRAIGHT AND OFTEN. Hunt with your kids. Teach them not to shoot anything that they are not going to eat. Have respect for all ANIMALS.
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Campfire Tracker
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Campfire Tracker
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I work up ALL loads with any powder in the heat of the summer when pressures will be highest,then run a few over the Chrony when the air cools in the fall.
til later
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Campfire Tracker
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Campfire Tracker
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Watch out. RL-22 is one of those powders that will definately let you know when you have reached the edge of the envelope! It will not allow you to push past that point, especially in the heat of summer! You need to be careful when working up loads with it. That being said, it is my all time favorite powder in my big rounds. Accuracy and velocity in my rounds are unsurpassed.
EZEARL's post above was a dead bullseye.
Best of luck
You only live once, but...if you do it right, once is enough.
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For years RL22 was my "go to" propellant with 338 Win Mag and 300 Win Mag. I face the same problem in developing loads in hot weather but my problem was the reverse; hunting in below freezing temps. With all the testing I did I found that reducing the powder in those two cartridges by 1 to 1�g in the summer heat I could achieve the same velocity in cooler weather when I shifted back. The bigger problem was a significant velocity loss in near zero conditions for the hunting. Based on my experience if you drop back about that same amount in your cartridge (1-1�g,) in the hotter weather you should be OK.
I don't believe you'll find any powder that isn't affected by extreme heat, at least that's my experience. The so-called temperature tolerant powders are only "tolerant" of extreme cold, not heat above about 70�-75�. For me RL22 lost over 200fps shooting at 12� from the loads tested at 65�. Use of the temperature tolerant propellants, like the Ramshot or Hodgdon Extreme line (Hunter and H4831,) solved that problem. My tests using the same chronograph in similar conditions resulted in no significant velocity loss, however, they all showed increased velocity (and obviously pressure,) when the temperatures rose above 75�.
Used to be bobski, member since '01
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Campfire 'Bwana
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Campfire 'Bwana
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I agree with Godogs and Earl. Gotta be careful with the double based powders. IME adding powder with RL22 above max and you will continue to get more velocity,regardless of temperature. With H4831(single base), you sort of hit a "wall" where adding more powder does not result in a whole lot more velocity. This helps a bit in finding "max".I think that the situation just gets a bit worse in hot weather with RL22.
That said,I run 60 gr of RL22 with 130's in one of my 270's and it has behaved very well in the summer here,and I used the load (once)at 25 below zero in Alberta.I have never used it at 100 degrees though.
Still, as much as I like RL22, these days I try a single base powder first in any new rifle.If I get what I want, I don't look further.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Ranger
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Campfire Ranger
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I've worked-up a (book) max load with RL22 and 130 gr. bullets in .270 Win. If worked-up @ approx. 60 deg. should they be safe if used at closer to 100 deg.? Thanks, Tim. Nope I wouldn't do it, but then again I wouldn't do it with any other powder our there either.... Dober
"True respect starts with the way you treat others, and it is earned over a lifetime of demonstrating kindness, honor and dignity"....Tony Dungy
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I ran two tests with a 6.5x55 useing different lots of R22 awhile back and reported on it here at the Campfire. I checked pressure and velocity differences at about 20-80*F shooting over a Pact M1 chrono with a Pressure trace attached to the barrel. The pressures did rise with temp but the funny thing was velocity stayed the same, and spikes appeared at cooler temps.
This means nothing as far what a 270 WSM will show but might alert you to a possible problem. The result of my test is in this link. https://www.24hourcampfire.com/ubbthreads/ubbthreads.php?ubb=showflat&Board=11&Number=1820371&Searchpage=2&Main=151021&Words=Ol%60+Joe&topic=0&Search=true#Post1820371
BTW, I`m still useing this load of R22 in my Swede, I just don`t push for "modern action" max loads with R22 anymore.
Last edited by Ol` Joe; 05/11/08.
I must confess, I was born at a very early age. --Groucho Marx
Patriotism is supporting your country all the time and your government when they deserve it. --Mark Twain
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Campfire Ranger
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Campfire Ranger
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For years RL22 was my "go to" propellant with 338 Win Mag and 300 Win Mag. I face the same problem in developing loads in hot weather but my problem was the reverse; hunting in below freezing temps. With all the testing I did I found that reducing the powder in those two cartridges by 1 to 1�g in the summer heat I could achieve the same velocity in cooler weather when I shifted back. The bigger problem was a significant velocity loss in near zero conditions for the hunting. Based on my experience if you drop back about that same amount in your cartridge (1-1�g,) in the hotter weather you should be OK.
I don't believe you'll find any powder that isn't affected by extreme heat, at least that's my experience. The so-called temperature tolerant powders are only "tolerant" of extreme cold, not heat above about 70�-75�. For me RL22 lost over 200fps shooting at 12� from the loads tested at 65�. Use of the temperature tolerant propellants, like the Ramshot or Hodgdon Extreme line (Hunter and H4831,) solved that problem. My tests using the same chronograph in similar conditions resulted in no significant velocity loss, however, they all showed increased velocity (and obviously pressure,) when the temperatures rose above 75�. I will have to try the H4831 again..I did not get good results with it the first time I tried but I started higher on the load list, I may try 55 grains of it to see how that shoots, my rifle seems to thrive on R22. BobbinNH suggested IMR4064 and I want to try that as well, I just bought 250 of the 130 grain Nosler seconds so I have a few "deer" bullets to burn..If your rifle likes RL22 which is the closest less temperature sensative powder?
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Campfire Ranger
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Campfire Ranger
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I would heed Mark's advice. There are a lot of other issues at hand than just ambient temperature.
As a side note, I use RL-22 in four cartridges and it is a great powder; there are certain other powders many use with the same "afflictions" with good results.
I'd like to think I would have enough range time with the load at different temps to know what to expect beforehand.
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If your rifle likes RL22 which is the closest less temperature sensative powder? The closest is H4831 but it's a tad faster than RL22. Behind that a good bit faster is Hunter and in the same range and just behind that is H4350. Ramshot Magnum would likely be way too slow. The best fit is H4831 but you should do OK with Hunter or H4350 as well. They all fit the "slow" category for that bullet and cartridge.
Used to be bobski, member since '01
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Campfire Regular
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Campfire Regular
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H4350 and 130 grain Hornady SP and Nosler PTs worked fine for me in the .270 Win. Nice easy load, close to max is very accurate.
Paul
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Campfire 'Bwana
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Campfire 'Bwana
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Remember Jimmy, we talked about 4064 because your objective was a moderate load for the cartridge;lower recoil and report,less velocity than what the case is capable of producing.To get the best out of the cartridge,and for loads in the vicinity of 3100 with the 130,RL22 and H4831 are most likely better bets.I have seen RL 25 produce excellent velocity and accuracy as well,and would bet that 7828 will do it,too. These last two are slower than usually recommended for the 270,but I have a hunch that, for example, 7828 behaves similar to the very old surplus H4831 which has not been around for years.If load density is OK, the 270 can use even slower powders than current H4831 or RL22. Actually, a lot of powders work well in the 270. 
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Ranger
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Campfire Ranger
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Yes, and I bought a pound of the 4064 to try it! If I can get good accuracy with a moderate load of 4064 from the Nosler solid base 130's I bought then this is probably what I will shoot for a while. A 130 at 2700 or so should do fine on the small deer I launch them at. On the other hand that does not work...
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Campfire Ranger
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Campfire Ranger
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Actually, a lot of powders work well in the 270. Why wouldn't they? It's a 30-06 case, and everyone knows how versatile that thing is.  
"Keep thy heart with all diligence; for out of it are the issues of life." (Prov 4:23)
Brother Keith
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Campfire Ranger
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Campfire Ranger
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personally I would be miserable hunting in 100 degree weather anyway!!
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Campfire Tracker
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Campfire Tracker
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There are only 2 potential issues from powder that varies with temperature:
1. If the load becomes maximum in the hotter weather?
2. If the point of aim changes in hotter weather?
If you load and check these two items, powder that varies is not an issue worthy of concern.
JW
When truth is ignored, it does not change an untruth from remaining a lie.
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