Ok. My understanding is that all the Alliant (including RL) powders are no longer being produced for the civilian market, and that once it’s gone, it’s gone.
What do you think about either powder with 245/250s with a 30" barrel?
Doable, but not ideal or optimized for the cartridge.
I find RL33 a bit slower than N570, and better suited for .338LM or Improved (it was my go to with 300s for the latter). RL50 is even slower so it doesn’t really make sense to me in a .300NM, but that’s just a hunch. I think RL50 is more popular with 37xc and 375CT, but I don’t shoot either of those these days so not direct experience.
.300NM is a lot like a .300WM shooting heavies or a .338LM shooting 250s, so lots of powers in that range from H1000 & Retumbo, RL25 | 26 | 33, and N170 | N565 | N568 | N570. And then weirdly I have one barrel I shoot 178s with N165.
I find RL33 a bit slower than N570, and better suited for .338LM or Improved (it was my go to with 300s for the latter). RL50 is even slower so it doesn’t really make sense to me in a .300NM, but that’s just a hunch. I think RL50 is more popular with 37xc and 375CT, but I don’t shoot either of those these days so not direct experience.
.300NM is a lot like a .300WM shooting heavies or a .338LM shooting 250s, so lots of powers in that range from H1000 & Retumbo, RL25 | 26 | 33, and N170 | N565 | N568 | N570. And then weirdly I have one barrel I shoot 178s with N165.
I wonder how LRT would do in the 300 NM. I use it in my .338 Norma, it's not ideal but I was able to find a ton of it.
Yes, it does. Even though I don't use them, we need all the players at the table because it helps all of us. It was posted here, and a bunch of other forums all over the net.
Vista suspended sale of Alliant powder?
Local gun shop posted this. There cancelling outstanding alliance orders Worldwide shortage of nitrocellulose? Are powders about to take a major hit?
www.snipershide.com
RL and H50 both are very consistent as far as speeds with 245s but suck balls in the speed department. A good thing I guess would be that you can never be overpressure with those powders in this case lol
I shoot a 300 norma improved but thinking about adding a straight 300 norma barrel so I don't have to improve for everything. What are you guys seeing performance wise n568 and n565 245 berger in the straight? What freebore you guys running for the 245?
Freebore is whatever AI uses PLUS whatever n570 has burned away.
With 245's I was getting 2900 fps but my 27" barrel has lost a ton of speed. I would guess a new barrel should be around 3k.
If you already have improved dies, brass why get a straight?
I haven’t shot the 245’s but I ran the 230’s up to 3150 with rl33 and currently shoot the 230’s comfortable at 3000-3050fps woth n570. Could probably get 3100-3120 out of it if wanted
I am new to the 300NM, have a bunch of Berger 220 LRHTs, N568, Retumbo, and H1000. Any advise on which powder to try first? Also, I'm having trouble finding data for N568 if anyone can point me in the right direction. Thanks!
Use N570 data and you’ll be on the safe side of things. N570 will produce a bit more velocity, but N568 max charges are a little larger(like 1%).
I felt the “n570 burning away the barrel” a little too much…… Still ordered 16 more lbs though because fuck it. What’s the point of driving an F1 car the speed limit? I didn’t get into 300NM because I cared about barrel life
Because usually it's just 50 fps or so compared to RETUMBO? I HATE getting rifles rebarreled, the wait time, the remeasurement and repeat load development and sighting in and break in and all that is a pain in the ass, and N570 is the ONE powder that guarantees you're going to be doing that more often. Unless you just shoot 50 rounds a year.
It takes me 10 seconds to rebarrel, and exactly two days to get a new barrel from the point I decide I want to do it to it being at my house.
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Also just because you have a 10 round mag doesn't mean you should shoot 10 round strings. That was my n570 mistake; after 10 rounds the barrel is about to melt into a puddle of steel.
I got out of the 300 Norma and N570 because I started to care about barrel life. I don't need to spend 200 rds breaking in a barrel before it speeds up to maybe get another 500-600 rds out of it, only to start the process all over again.
For me, load development encompasses a lot more than it should, but I'm anal. I'm trying different powders, bullets, primers and seating depth at 100 and then verifying at 600 yards, and I lose sleep if I don't think I've exhausted all the potential into the load. But that's just me.
Fair enough. I can completely see how that would get up there quickly. I do the painless method off rokslide.
I figured if they aren't going to let me get any more...there's no use in saving or sparing it. Might as well shoot up the 6-7 lbs I have left.
300 Norma Mag 35 Imp and I think it's a 28" barrel. I didn't want to go 30 cause I might shoot this suppressed one day.
I'm still working up loads but it's been cold as balls lately so I'll work on it more when it's more reasonable out. I may grab a pound of Ramshot LRT if people think it compares close to RL33. I've been a big fan of RL33 for the heavies (180-195gr bullets) in my 7 Rem Mag as well and always planned to use it in a 300 Norma Imp
I have a thread over at LRH I started because I didn't find much data for RL33 with 250s
If I overlay all 6 of the shots from 94 to 94.4. It still shows sub 1/2 at 300 yds.
300 Norma Mag 35 Imp and I think it's a 28" barrel. I didn't want to go 30 cause I might shoot this suppressed one day.
I'm still working up loads but it's been cold as balls lately so I'll work on it more when it's more reasonable out. I may grab a pound of Ramshot LRT if people think it compares close to RL33. I've been a big fan of RL33 for the heavies (180-195gr bullets) in my 7 Rem Mag as well and always planned to use it in a 300 Norma Imp
I have a thread over at LRH I started because I didn't find much data for RL33 with 250s
Everything seems to be tracking out to 300 yds. Just about everything I feed it is sub 1/2.
After running loads up to 94gr in a single charge to look for pressure. I decided to test the following 5 pairs in 0.2 incriments. Again, not looking for a load persay, just refining what kind of pressure we're seeing and lookign for loads that DON'T shoot.
I've said in the past and I'll say it again. a 2 shot group doesn't tell you if a load WILL shoot...but it absolutely will tell you if a load WONT shoot.
Still didn't really feel pressure but the Coup de Grâce is a little hard to "Feel" pressure so I'll measure some cases and decide after work how to proceed.
93.6 - 3020 and 3007
93.8 - 3007 and 3051
94.0 - 3022 and 3022
94.2 - 3046 and 3060
94.0 - 3022 and 3022
94.2 - 3046 and 3060
94.6 - 3049 and 3039
If I overlay all 6 of the shots from 94 to 94.4. It still shows sub 1/2 at 300 yds.
On suppressing .300NM, I've run a few different .30 cal cans on a variety of barrels and the verdict from my limited experience is "go with a .338 can." 
please explain. I have no interest in stepping up to a 338 can, regardless of the reason, but I'm curious why I would want to.On suppressing .300NM, I've run a few different .30 cal cans on a variety of barrels and the verdict from my limited experience is "go with a .338 can."
With Retumbo (should be very close to 568) I’m getting 2895-2900: 81.0gr, 215M primers, Lapua brass, 245 Berger LRHT, 27” factory AI barrel. I shot a 16-round string Saturday with an SD under 5.
Because the 338 Ultra is one of the best and quietest cans out there, and you CAN step up to 338 rifles later if you change your mind. It works just as well on everything from 6.5 to 338 for me.
Because they weren't comfortable to shoot at all, either 24" up to 32" barrel, heavy profile or carbon fiber - didn't matter. Moving up to a .338 can made it feel more like shooting a suppressed .308WIN.
Edit: specifically the CGS Hekate DT
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I already have a 6.5 and .30 Ultra 9. You'd have a hard time convincing me a 338 Ultra 9 will suppress it better than a .30 Ultra 9
Alas, I won't be adding one anyway
I agree that 338 suppressors perform better for 300 NM loads. Suppressors are built to handle a certain amount of pressure and volume of propellant.
It’s been my experience that the larger 30 caliber suppressors sound great up to a propellant charge of 70ish grains of powder. The 338 cans handle up to 90-100 grains of powder and perform well. This is of course my experience and you need to confirm with the manufacturer as there are exceptions. For example many manufacturers do not recommend using their can with 30-378 and 33-378 cartridges even in their 338 caliber cans. These cartridges can utilize up to 120 grains of powder.
Many 30 caliber cans are rated for 300 NM but are not the best choice from a performance perspective, that is why the 338 cans are preferred.
I can’t imagine why it wouldn’t be intuitively obvious. I have 30 ultra and 338 ultra gen 2 and one of them is enormous compared to the other.
Volume matters and yeah it sounds great with 300nm
I couldn’t care less if I convince you of anything. You asked a question and I gave you an honest answer from my experience. But a 338 Ultra is not a “338 Ultra 9”. It’s 10-1/2”, not 9”. As we all know, suppression is volume-dependent, and the 338 Ultra has significantly more volume that a .30 Ultra 9. Look up TBAC’s dB suppression numbers and make your own conclusions.
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I’ll probably do that too, at some point, but now they’re hard to get. I’ve got 2 Ultra 338 Gen 1s, and just got a Gen 2 SR. The RR would be the next logical step.
I've never had a need for a 338 can in the first place, so it's been YEARS since I even compared brands. I didn't realize it was a completely different model. Yes, obviously if there's that much of a volume difference it makes sense.
Massive difference between a 338 ultra gen 2 vs 30 cal can I have heard
If you're worried about the unpleasantries, switch to a 308. You're burning 80-90 gr powder, pushing 230-250gr bullets, Big ass bullets going fast! Wtf do you expect? You're going to deal with recoil, or extreme muzzle blast from the large gas volume venting through a brake. Pick ur poison......or pick a different cartridge.
I might of not worded it correctly but I was saying the suppressor was unpleasant with the 300 norma ultra 9 that's why I switched to the brake.
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