fishdundee
Active Member
So I'm sitting on 8lbs of N568 and wondering if anyone has given this a shot in a 7 saum or anything else for that matter. I would love to hear some results with anything you may have tried it in.
Skol'
Dean
Skol'
Dean
N568 and 7 SAUM..Anyone tried this yet?
- Thread starter fishdundee
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It's slightly slower than n570. Going to be best suited for long action magnums. The bigger the better.
I've tried it in 7 SAUM, it shoots tight groups but its a about 100 FPS slower according the crono than the Retumbo, I will have to look up the GR I used but it was pretty close to the same as the 64 Gr Retumbo (Near Full Case)180 Gr Berger Hybrid 3,075 FPS, this is out of a long action Rem 700, 26" Bartlien 7.5 twist CF, ogive about 20k off the lands
I love 568 in Nosler cases its better suited for big Magnums. Case fill to equal other powder velocity will be a problem in smaller cases. In my experience the burnrate falls close to RL33 definitely slower than 570. I'm about 5 grains more vrs H1000 in my 30-28 to achieve same velocity.
This is what 568 shot in a 28Nos and 195's 3050fps about 2 months ago
This is what 568 shot in a 28Nos and 195's 3050fps about 2 months ago
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N568 is a blend between N565 and
N570
It is closer in burn rate to N570 than N565.
I forget the exact number on N565 but it has a .33 to .34 burn rate.
N568 is slower at .30
N570 is slower still at .27
N568 anecdotally is more accurate than some other powders in its burn rate class but it does not produce the velocities some other powders can or do.
I like the way it meters best of all the N series VV powders.......maybe this accounts for lower ES and SD and better groups?
It meters more like H1000 or RL 26
Not chunky like N560, N565, N570.
Though its burn rate is between both N565 and N570, its velocities for a given bullet are below both N565 and N570.
N570
It is closer in burn rate to N570 than N565.
I forget the exact number on N565 but it has a .33 to .34 burn rate.
N568 is slower at .30
N570 is slower still at .27
N568 anecdotally is more accurate than some other powders in its burn rate class but it does not produce the velocities some other powders can or do.
I like the way it meters best of all the N series VV powders.......maybe this accounts for lower ES and SD and better groups?
It meters more like H1000 or RL 26
Not chunky like N560, N565, N570.
Though its burn rate is between both N565 and N570, its velocities for a given bullet are below both N565 and N570.
No matter what the numbers say it is not faster than 570, ive used enough of both to find out.
Whats the difference?
The burn rate of a powder is the rate at which the powder itself burns and the characteristic way in which it generates a pressure curve from chamber to muzzle.
The velocity is the velocity of the bullet at the muzzle. So burn rate is the powder, velocity is the bullet the way I am using it.
The velocity produced by a powder on a given bullet is gonna depend on the weight and friction of the bullet, but also on the pressure curve a particular powder produces in the rifle.
Chemicals added to some powders may end up retarding pressure curve and bullet velocity even if the burn rate of that powder is faster than another powder.
Shape of the powder, ball or stick, and density packed in the case also has an effect.
Hope that helps,?
Yes, that shows the energy content of N568 is less than either N565 or N570, and its less dense, so anecdotally and from
Quickload you get a little bit less velocity for a full case of N568 than you do the other powders even though the burn rate of the powder itself is faster than N570.
Here the burn rates for some popular slow powders out of quickload. Fastest burn rate to lowest. ranking.
Quickload you get a little bit less velocity for a full case of N568 than you do the other powders even though the burn rate of the powder itself is faster than N570.
Here the burn rates for some popular slow powders out of quickload. Fastest burn rate to lowest. ranking.
| RL25 | 0.384 | |
| N560 | 0.371 | |
| H1000 | 0.366 | |
| Ramshot Mag | | 0.345 |
| RL26 | 0.3397 | |
| Acc Magpro | | 0.3342 |
| Retumbo | 0.337 | |
| N565 | 0.3109 | |
| IMR8133 | 0.3 | |
| N568 | 0.3 | |
| Ramshot LRT | | 0.285 |
| N570 | 0.277 | |
| RL33 | 0.267 |
You can throw all the numbers from quickload all you want i will go off real world experience. I remember how quickload was way off when the Nosler cases first came out.
FACT! it takes more 568 to reach same velocity than 570 by atleast 2 grains in my 30-28 with everything being equal.
FACT! it takes more 568 to reach same velocity than 570 by atleast 2 grains in my 30-28 with everything being equal.
I dont think you read what I said.
I actually agreed completely w you that N568 will not produce as high a velocity as N570 for the same bullet. It is less dense and doesnt have as much energy content.
Please re read the last 2 or 3 posts here. The point I am trying to make is that burn rate does not ALWAYS perfectly correlate to muzzle velocity.
Even though N568 has a faster burn rate than N570 it does not produce as much energy or velocity. Thats what you said too.....
N565 & N560 is what you want hands done. Proven it in 5 7 saums. Hands down
