Powder Question?

[PA BEN]

I've been using IMR4350 w/good results. I've read Reloader22 is a better powder for Magnums. I'm loading for 7mm REM. MAG. What do you guys w/more experience have to say?

[Jamieb]

RL-19 is a closer burn rate to IMR-4350 then RL-22.
I use RL-22 with 160gr bullets in my 7mag.

[fishnate]

I reload my 7WSM with 4350 also works good with many diff loads. doesnt hurt to try something else though you never know what might work best for your rifle.

[Caretaker]

I personally don't like RL22, too temperature sensitive.  The hotter the weather the hotter the loads, by several hundred feet/sec, making accuracy go out the window.  My experience is with .257 Wby.

[HUNT]

I've been very happy with the accuracy of loads with all of the alliant powders I have tried. 

[6x6in6]

I tried RL 19 and 22 and IMR4831 thru my M77 7MM RM.  19 was the best of the three but all were a bit inconsistent.
I went back to IMR 4350.
I have yet to try any other but the 4350 thru the Tikka in 7MM RM.  So far, very happy.  Probably won't even experiment either.
This is pushing Nosler Partitions in 175gr.  The 4350 loads are .5 over max in the Nosler book, FYI.

[PA BEN]

I tried RL 19 and 22 and IMR4831 thru my M77 7MM RM.  19 was the best of the three but all were a bit inconsistent.
I went back to IMR 4350.
I have yet to try any other but the 4350 thru the Tikka in 7MM RM.  So far, very happy.  Probably won't even experiment either.
This is pushing Nosler Partitions in 175gr.  The 4350 loads are .5 over max in the Nosler book, FYI.

Please elaborate a little more on whats inconsistent. Groups? Muzzle Velocity? etc. Thanks

[6x6in6]

Groupings.

[Jekemi]

what about IMR 4064; anyone using it? I've heard that it works well with 7MM and burns very clean. One guy I spoke to remarked about how easy it was to clean his gun after using 4064.

[Ray]

Alliant RL 19 and IMR 4350 on 7mm Rem Mag. Both work great for me.

[JackOfAllTrades]

I know guys that use RL19, RL22 and IMR4350 with great success for 7mag and 300winmag. A statement that RL22 is better for magnums is BS. I use IMR4350 for 30-338 for heavier bullets with great accuracy pushed to the limits of the cartridge. A friend of mine does the same with RL22 with his 300win, and also has loads developed with IMR4350 for his 7mag. Realize that both of his magnum cartridges are longer than my 338 case, but I know a guy that uses IMR4350 with his 300Weatherby mag (longer case) with great success. As stated, RL19 has a closer burn rate to that of IMR4350, but many of the powders in that burn rate are so close, that it's a matter of several other factors that may determine which is best for your chambering. You'll need to just try some; Work up a load to get the best accuracy with the bullet running the velocity you're striving for.

-Steve

[elkaholic123]

In my 270WSM with 65 gr. or reloader 22 I was getting 3000 fps with 140gr Accubonds
I switched to r/l 17  61 gr. am now getting 3130 fps   r/l17 burn rate is real close to 4350 and is not temp. sensitive!  
http://www.6mmbr.com/reloder17.html[/url
Engineered for Enhanced Energy, More Velocity
How does RL17 produce so much added speed? There are two main reasons--unique burn properties and high load density. In its chemical properties, RL17 is like no other powder available in the U.S. market. Made in Switzerland by Nitrochemie, RL17 has a unique burn-rate controlling chemical that penetrates all the way through the kernels. Other common extruded powders have only a surface coating. Reloader 17's unique penetrating burn-rate regulator smooths out the pressure curve, allowing RL17 to maintain high energy for a longer period of time

[carpsniperg2]

i have never like reloader i have a few cans think they are 22 and 19 have not used them in a few years, i like imr way better but 90% of the powder i use is hodgons i never got that great of groups with the loads that i was loading up with it.

[Jamieb]

I personally don't like RL22, too temperature sensitive.  The hotter the weather the hotter the loads, by several hundred feet/sec, making accuracy go out the window.  My experience is with .257 Wby.

RL-22 is temp sensitive but you'll never see velocity swings of several hundred FPS from Temp. change.
I've burned literaly hundreds of pounds of RL-22, mostly in the 7 mag with 162gr A-max's. Shooting in Temps ranging below freezing to upper 80's I cant tell any difference but when it gets relay hot out, 90* + the POI is a little higher but its only noticeable at long rang, Past 500 yards.
Last summer I was shooting steel at 1000yards with a friend over in Walla Walla, it was hot, around a 100*. I was consistently hitting about a foot high that day with my 7mag/RL-22/162gr A-max.

[PA BEN]

Went and shot RL-22 and IMR4350 today. 7mm Rem. Mag. 160gr Nosler AccuBond, New Win. case, CCI Mag. Primer. RL-22 on left, IMR4350 on right 90yds.
Both groups started w/a clean gun.

This is the RL-22 #1 is First shot clean bore, 2 & 3 Landed next to each other. Max load is 63grs, this group is 62grs. Max load FPS is 3058

This is IMR4350. W/max load of 60 grs. FPS w/max load is 2998.

[JackOfAllTrades]

Now, don't change a thing with OAL, crimp, bullet, case or primer. Reload each of those cases that are now fireformed, (neck sizing only) Load each of those loads with .3gn less, and .3gn more (look for pressure signs as you shoot the warmer ones). Test fire again. 

Then... and I think there's a thread on bullet seating depth here somewhere, then you get to play with OAL to find the absolute most accuracy. And not to knock the Accubond, but there are other bullet choices that may prove to be more accurate than what you're shooting now.

You could still sort the fire formed brass with a case concentricity guage after you've neck sized...

RL22 may prove to be better for you, but you don't know for sure yet.  I tell ya... I've got a load that is a bit on the warm side, with 4350 pushing a 180gn Speer SBT at 3100fps that is a tack driver, but the same load pushing a Sierra BT match bullet is erratic as hell. Drop the charge a bit for the Sierra match bullet and it's even more of a tack driver. But alas... Not the velocity and trajectory I'm striving for. So, even though its accurate, I don't load it. (I didn't buy a magnum to be shooting 30-06 performance)  Anyway... All I'm trying to say is work up your best loads with each powder and keep a good record book so just in case.. You can't find a particular powder some day, you'll still have something to fall back on. I've got loads for multiple powders and bullets for my primary rifles.

-Steve

[PA BEN]

Thanks for the info. I notice the 60grs of 4350 kicked a little more then the RL22. As far as the AccuBond goes. This is the bullet I have chosen for elk this year. BTW, the IMR4350 load grouping was better with once fired cases, neck sized.