7 PRC/7SAUM Velocities

[Korhil78]

I also like RL23 and N560 for the 7 PRC and 7 SAUM. I do like RL23 better even though it's super expensive now.

Both powders do well with the 170-175 Gr bullet range. I have 8 lbs of each but I get better ES with RL23.

 

[2buffalo]

Yes, N565 is just like all the 500 series V powders. They eat the throats. If you want a barrel to last and still have good velocity then go with RL23 for sure. If I were you then I would for sure use the RL23.

Why RL23 over RL25?

 

[Korhil78]

RL23 is way more temp stable than RL25 if that matters at all to you.

 

[Longtine88]

 

[Longtine88]

the two powders with the best ES number will be N560 and RL 23. I love RL 23 I just don't have a lot of it and save it as much as I can. I have lots of N560 N565 N570. I am going to try N568 with the 195's soon since N570 does so well with the 195's. Just a pain using a drop tube and vibrating cases with the N570. But man it and the 195's are like peas and carrots.

 

[Korhil78]

the two powders with the best ES number will be N560 and RL 23. I love RL 23 I just don't have a lot of it and save it as much as I can. I have lots of N560 N565 N570. I am going to try N568 with the 195's soon since N570 does so well with the 195's. Just a pain using a drop tube and vibrating cases with the N570. But man it and the 195's are like peas and carrots.

That's awesome. I love N560 as well. I just bought 8lbs of N568 just because it was so cheap on Midway haha. Don't even know what I'm going to use it in yet.

 

[Longtine88]

There always two nodes with RL 23 that stand out. One around 2,900 and the other hovers around the 3,000 mark with the 175's.

 

[RH300UM]

standard bottom metal or another?

Orbendorf

 

[dogz]

RL23 is way more temp stable than RL25 if that matters at all to you.

Korhil78---curious as to how you ran your tests to determine this, when you get a minute please outline them?

For me, I've temp tested 25 but only in one round. I haven't done a thing with 23 as of yet.

 

[Longtine88]

Experience. RL25 is very temp sensitivity. One of the higher ones in my book. RL23 is right there with RL16, Varget, H4350, H1000, ARcomp etc.

 

[dogz]

So interesting how our findings differ.

In my testings (I always use the same 5 cases, exact same lot of powder, and the same box of bullets), same sleve of primers. I test them during summer temps of 70 or so then I wait for a 20 below or so day in the winter. I store the ammo in the truck over night.

I've not seen a lick of difference between the R's (17,22, 25, 26), the 4350's (H and IMR), 7828, Varget, R15 and probably a couple more. Day in and day out all of these will lose about the same (within a few feet of each other).

IMO the temp sensi or non sensi is incredibly over rated and marketed!

Just one man's humble opinion and experience

 

[Korhil78]

Korhil78---curious as to how you ran your tests to determine this, when you get a minute please outline them?

For me, I've temp tested 25 but only in one round. I haven't done a thing with 23 as of yet.

Mine is experience of using both powders living in the SW desert of New Mexico as well as doing my own searches and studies of people who have done tests on it.

Down where I live, it can get down to 20's in the winter time and as high as 110 degrees in the summer. I have developed loads in the winter time with RL25 for a 300 win mag (back when I used it) that would be fine as long as you shot it in the winter but shooting it in summer was a no go because of the pressure spike from the heat.

I did load work up with RL23 in my 7 MAX and 2 7 rem mags in the winter time and have shot them in summer time with no issues.

People have also done temp tests that you can search on the internet with RL25 that shows that it is really temp sensitive especially 90 degrees and above.

I like doing load work up in the winter time here because I get to do more shooting in the day. In the summertime, it's really not possible for me at least because of the heat and mirage of you are shooting groups at longer ranges.

 

[Korhil78]

I will also add, that the closer you are to the max load, the more prevalent it is going to be. A lot of people, claim a lot of outrageous speeds in cartridges that I can't come close to getting. It's the really hot days that did it for me.

 

[Longtine88]

So interesting how our findings differ.

In my testings (I always use the same 5 cases, exact same lot of powder, and the same box of bullets), same sleve of primers. I test them during summer temps of 70 or so then I wait for a 20 below or so day in the winter. I store the ammo in the truck over night.

I've not seen a lick of difference between the R's (17,22, 25, 26), the 4350's (H and IMR), 7828, Varget, R15 and probably a couple more. Day in and day out all of these will lose about the same (within a few feet of each other).

IMO the temp sensi or non sensi is incredibly over rated and marketed!

Just one man's humble opinion and experience

Two different worlds dogz. You're in Montana, I'm in Texas. Your summer temps like your said....70ish. You won't have problems with that kind of temperature with hardly any of the powders. It's when it hits 90* and more is where you're blowing primers or worse. I've locked rifles up that were fine shooting 20-70 degrees when shooting higher temps. You don't have that with RL23......thus it's a lot more temp stable. RL25 when it hits 90 degrees and more it's a totally different animal. And a lot of powders are like that also. I could name a bunch. The N series powders you would think would be some of the worse. But they really aren't near as bad as RL25 for sure. So I stick to the ones that me or my kids or wife aren't going to grab and lock an action down in the summer time. Depends on how you load them to and how close to pressure you are at the time to some extent also. Just know how you load and what powder you are using and they all will work.