I couldn’t get enough H50 in the case to get to my desired velocity with 245’s. Was up to 96 grains and she was getting pretty full. Found some N570 and it shoots great.
Just received my new 300 norma brass. The necks come .3465 I'm guess going to have to run a .338 bushing. But waiting on shell holders and I will run them threw mandrel and load a dummy to see. They seem very tight necked. Got barrels dropped off and action is at smith's so within the next 3 weeks it should be done
Lapua 300 Norma Mag Brass Box of 100
Lapua World-class brass begins with high-quality raw materials and superior smelting and metallurgical competence. Throughout the production process,...
www.midwayusa.com
Midway has good prices on lapua 300 Norma brass. I'm posting it here so I won't be tempted much longer haha.
On another note, manson reamer at .2148" freebore should work just fine with the Berger 245gr LRTH. Both brass and bullets seem to be popping up lately.
Here's about what they'll be seated at to get .040" off the lands +/-. I think the .215" reamer is about perfect. Just good to get a visual idea. IMO not worth ordering a custom reamer.
Lapua 300 Norma Mag Brass Box of 100
Lapua World-class brass begins with high-quality raw materials and superior smelting and metallurgical competence. Throughout the production process,...
Midway has good prices on lapua 300 Norma brass. I'm posting it here so I won't be tempted much longer haha.
On another note, manson reamer at .2148" freebore should work just fine with the Berger 245gr LRTH. Both brass and bullets seem to be popping up lately.
Here's about what they'll be seated at to get .040" off the lands +/-. I think the .215" reamer is about perfect. Just good to get a visual idea. IMO not worth ordering a custom reamer. View attachment 8223359
Yeah I've seen the 245 lrht popping up, I grabbed 200 to give them a try.
Lapua 300 Norma Magnum Brass #4PH7090
Product Information Cartridge: 300 Norma Magnum Finish: Brass Condition: New Quantity: 100 Primed: No Primer Size: Large Primer Pocket *This is not loaded ammunition.
www.bluecollarreloading.com
AXSR 300 norma
8 twist factory barrel
Edit: these speeds are on a new barrel- 100 rounds fired.
New lapua brass
Federal 215 primers
Velocity gathered with magnetospeed
Outside temp 87-90f
The lower charge weights did not group well, some as big as 1.3 moa. Once I started to increase charge weights the average group size was .6-.7 moa at 100yds.
220 LRHT
85gr H1000
3053fps
.478 moa @ 100yds
same rifle
220 LRHT
N570
3147fps
.631 moa @ 100yds
Still adjusting powder charge and seating depth.
What are other owners of AXSR w/ factory barrels seeing for accuracy and speeds?
8 twist factory barrel
Edit: these speeds are on a new barrel- 100 rounds fired.
New lapua brass
Federal 215 primers
Velocity gathered with magnetospeed
Outside temp 87-90f
The lower charge weights did not group well, some as big as 1.3 moa. Once I started to increase charge weights the average group size was .6-.7 moa at 100yds.
220 LRHT
85gr H1000
3053fps
.478 moa @ 100yds
same rifle
220 LRHT
N570
3147fps
.631 moa @ 100yds
Still adjusting powder charge and seating depth.
What are other owners of AXSR w/ factory barrels seeing for accuracy and speeds?
Last edited:
I need to get off my FA and load up for my barrel. Probably start with EOL.245/N570 or Hyb.215/H1K. I‘m just scared I’ll like it too much and might need to buy a backup barrel for it asap….
245 LRHT
Lapua Brass
CCI 250
87.5 gr N570
0.020 off lands
3060 avg fps
No pressure issues, was faster than I expected. Best ES was 12 and SD 6.3 with a 5 shot group. .38 moa.
Lapua Brass
CCI 250
87.5 gr N570
0.020 off lands
3060 avg fps
No pressure issues, was faster than I expected. Best ES was 12 and SD 6.3 with a 5 shot group. .38 moa.
I also have very extensive access to all these and I currently shoot N565 because I achieve the velocities I want for hunting and according to some applied ballistics testing N570 burned out barrels much faster than N565. That being said, when I shoot the NF ELR next year I'll use N570 because I want ever fps I can get.
In some of the above posts its said that there is a "tiny" loss in FPS moving to N568. If it's like 25-50fps with easier metering, cooler burning and long barrel life, then I'm not sure why everyone isn't talking about it.
I'm planning on grabbing 16lbs so I'm just putting feelers out incase I'm missing something. Will probably end up with N570.
I'm planning on grabbing 16lbs so I'm just putting feelers out incase I'm missing something. Will probably end up with N570.
I have heard the same with 568, I'm not sure why it's not more popular. I haven't experimented with it yet because I got the results I wanted with 565 for hunting, and I wanted maximum performance for matches. I lose about 100-150fps using N565 over N570 I will say, I have a matchmaster and N570 is awful through it, it gets stuck in the small tube all the time and will just spin the trickle tube forever until I stick a small dowel up the tube and break the kernels free.
Easier metering yes, but not cooler burning from what I can tell. If you want to save the throat from too much heat, try N165 or N170.
Would it be safe to equate N568 to a "short cut" version of N570?
Getting into 300NM with the thought that preformance is primary with barrel life being a nice after thought.
Yes, from my testing it's a little closer to N570 than N565 and without the huge granules. It also seems to be even less temp sensitive than N570.
Just to add: N565, N568 & N570 are almost perfect powders for .300NM. N565 is really good for bullets in the 190-230gr range, and N568 & N570 are good for 200-250, easy.
If the 1/100s digit being off bothers your OCD, go for the n568. Freaking N570 granules are huge at .08. 
N570 does meter fine out of my autotrickler.
N570 does meter fine out of my autotrickler.
So Im pretty sure Ive finalized my loads for the 300 NM with 250 A-Tips and Reloder 50. However, the group size is only .77 MOA which I felt rushed and was fighting mirage from my can. Maybe I can tighten it up without adjusting the seating depth, but in comparison, the Berger 230 factory ammo was 0.8x MOA and was 2886 fps, SD 20.2 and ES 85 (25 rounds), and was still able to produce a 1.23 MOA 5-round group at 1730 yards, which those 5 rounds had an ES of 18.
AXSR 27" factory barrel (1:8) with TBAC 338 Ultra SR
Lapua 300NM brass
CCI 250 OEM primers (only primers I could find in the last year)
250 A-Tip BTO: 2.845" (0.02" off lands, and 0.102" off mag COAL)
91.0 gr RL50
2895 fps
SD: 3.52
ES: 8
(only 5 rounds fired of Magnetospeed)
AXSR 27" factory barrel (1:8) with TBAC 338 Ultra SR
Lapua 300NM brass
CCI 250 OEM primers (only primers I could find in the last year)
250 A-Tip BTO: 2.845" (0.02" off lands, and 0.102" off mag COAL)
91.0 gr RL50
2895 fps
SD: 3.52
ES: 8
(only 5 rounds fired of Magnetospeed)
Any good starting loads for N568 and Berger Hybrid 215grs?
They have loads for 230, but I'm not sure if I should back it down or increase to start.
Ordering a custom barrel for my Barrett MRAD through Southern Precision Rifles. In 300 Norma Mag, what do you all recommend for a barrel length and twist rate? FYI will be a Bartlein ModBB Heavy Varmit Contour.
I was thinking a 30 inch with 1-8 twist, but would love to hear from you all.
I was thinking a 30 inch with 1-8 twist, but would love to hear from you all.
What kinds of velocities were you finding with a 30" and with what grain bullets?
I'm getting ready to have another barrel spun up, and ready to invest in my own reamer for 300 Norma. Should I make any adjustments to the standard reamer print for the 245 LRHT bergers or the 250 ATIP?
To fire form I just dumped in 25 grains of Greendot in the case and sealed it by sticking the neck into a bar of soap. Worked like a charm and smelled oh so fresh. LOL
When I was little my grandpa blew up a rifle firedorming making a mistake so I just shoot full charges to be safe. I know a lot of people have good luck but that was enough for me lol
Hi everybody, wanted to drop a quick question. How many firings is everybody getting on their Lupua brass?
I’m running lupua brass, F215GM primers, N570 and 225 eldm’s that run at around 3100 fps or just under. So not pushing too hard, but they’re not baby loads either.
I load a 0.002” headspace, trim to 2.486”, and shoot 0.015” off the lands.
I’ve now thrown away about 12 or so bullets after 11 firings. Does this sound normal?
I’m running lupua brass, F215GM primers, N570 and 225 eldm’s that run at around 3100 fps or just under. So not pushing too hard, but they’re not baby loads either.
I load a 0.002” headspace, trim to 2.486”, and shoot 0.015” off the lands.
I’ve now thrown away about 12 or so bullets after 11 firings. Does this sound normal?
Ah shucks. I should edit the post I made earlier.
I’m experiencing case head cracking (not separated yet, but a clear crack that you can see and feel with your finger nail)
I’m scared to fire that brass again since I don’t want it to actually separate when I extract from the chamber.
It took anout 11 shots before this started happening. This was actually the purpose of the post, and I forgot to include it.. sorry
I guess you know the next question. What's your shoulder bump look like? Is this standard or improved? If improved, how did you fire form?
It’s a normal 300 NM, using a 0.002” headspace (shoulder bump) - I’m meticulous about this, so every case is measured.
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