300 win mag & 180's (3 Satterly Tests) - I can't believe what I'm seeing

[Magnum61]

I had a crazy day at the range today. I did 3 Satterly tests with my 300 win mag (first time to test the method)

At first, I thought my chronograph was broken because I've never seen anything past 3110fps with a 180 in my 300 win mag. Luckily there was a great guy at the range with a radar that came over and helped to see if my chrono was broken. This exact gun at 2 other loads [210 Berger @ 2865fps] & [200 Accubond @ 2920fps]. I wanted to share this to make sure Something isn't going wrong. I marked in the data where the bolt went sticky from pressure.

Let me know if you're seeing anything I'm not. I've never seen 180's out of a 300win mad at these velocities



Gun:Rem700 Build
26" Lilja 3 Groove 1/11"
300 win mag

DATA:

180 Swift Scirocco
OAL-Ogive:
3.798 (.050 jump)

H1000 - 81g Max Load (Nosler Manual)

81
80.8
80.6
80.4
80.2 - 3253 (Stiff & Primer flow) Stopped
80 - 3244 (light stiff)
79.8 - 3244 (light stuff)
79.6 - 3252 (sticky)
79.4 - 3244
79.2 - 3244
79 - 3197


RL23 - 73.5 Max load (Nosler Manual)

73.6 - 3182
73.4 - 3182
[Stacked on target (above)]
73.2 - 3167
73 - 3189 (Sticky)
72.8 - 3167
72.6 - 3159
72.4 - 3144
72.2 - 3152
72 - 3152
71.8 - 3108,3115, 3114

——————

RL22

76.6 - 3205
76.4 - 3205
76.2 - 3197
76 - 3189 (3205 radar confirmed)
75.8 - 3159
75.6 - 3159
75.4 - 3144
75.2 - 3144
75 - 3129
74.8 - 3144

 

[JakeSCH]

Out of my 24" barrel by my 181gr hammer load data with RL23 is very close to yours.

However, I am completely shocked by the H1000 load data. That is 200 fps faster than I could get.

 

[Buckshot85]

I know nothing of reloading.
Im waiting on a custom loader to get components in.
They want coal length, to tip not to ogive with a specific projectile.
Your measurement of 3.798 to ogive seems extremely long.
Ive used the Hornady COAL tool to measure the max base to tip, which is what that custom loader wants. Same cartridge, 300 WM.
I have also measured factory ammo. Longest I’ve measured was 180 NAB at 3.571”.
My mag box is only 3.675”
You have 3.798 base to ogive?

And still have .050” left for jump?

 

[Magnum61]

I know nothing of reloading.
Im waiting on a custom loader to get components in.
They want coal length, to tip not to ogive with a specific projectile.
Your measurement of 3.798 to ogive seems extremely long.
Ive used the Hornady COAL tool to measure the max base to tip, which is what that custom loader wants. Same cartridge, 300 WM.
I have also measured factory ammo. Longest I’ve measured was 180 NAB at 3.571”.
My mag box is only 3.675”
You have 3.798 base to ogive?

Correct - I'm shooting a Remington action and my box accommodates the ability to seat out to tailor the load to the chamber. My Bullet engages the rifling with my Stoney Point Gauge (now Hornady) at 3.848

 

[Buckshot85]

Wow. Is that a longer than normal throat?

 

[Magnum61]

Wow. Is that a longer than normal throat?

Pretty Standard for the 300 win mag barrels I've had

 

[Magnum61]

@Ryan Avery @Broz I'd love to hear your take on this.

 

[Buckshot85]

Thanks, Magnum. Interesting info you posted.

 

[Magnum61]

Thanks, Magnum. Interesting info you posted.

Reloading is a ton of fun - you should try it!

 

[wind gypsy]

Correct - I'm shooting a Remington action and my box accommodates the ability to seat out to tailor the load to the chamber. My Bullet engages the rifling with my Stoney Point Gauge (now Hornady) at 3.848

You have to be including the 1" that the hornady comparator adds to your measurement or doing something else. You are probably at 2.848" BTO. There is no way you are at 3.848" BTO and still have a 180 in the neck of the case. Your COAL would be something like 4.4+"...

For comparison, a 215 berger's bearing surface would be almost a full inch OUTSIDE of the neck at 3.848" BTO. A 215 loaded to 3.848" COAL wouldn't have enough bearing surface in the neck to make me comfortable.

 

[Magnum61]

You have to be including the 1" that the hornady comparator adds to your measurement or doing something else. You are probably at 2.848" BTO. There is no way you are at 3.848" BTO and still have a 180 in the neck of the case. Your COAL would be something like 4.4+"...

For comparison, a 215 berger's bearing surface would be almost a full inch OUTSIDE of the neck at 3.848" BTO. A 215 loaded to 3.848" COAL wouldn't have enough bearing surface in the neck to make me comfortable.

Yes, you are correct. I did forget to subtract the gauge in that number. Thank you

 

[Buckshot85]

Now ya'll have me a bit confused. Can you elaborate some, please?

 

[wind gypsy]

Now ya'll have me a bit confused. Can you elaborate some, please?

The hornady comparator tool used to measure to bullet bearing surface is 1” long with the inserts so your calipers are open 1” wider than the dimension of the bare end of caliper to where comparator is making contact with the bullet’s ogive. If you don’t subtract that 1” from a dial caliper or zero it out on a digital caliper your caliper will read 1” longer than the actual BTO dimension.

 

[Marble]

I've been getting 3200 with mine also

Browning A bolt 2
180 nosler AB
71 grains of H4350
Shoots about 1/2 MOA

Sent from my SM-G986U using Tapatalk

 

[Magnum61]

I've been getting 3200 with mine also

Browning A bolt 2
180 nosler AB
71 grains of H4350
Shoots about 1/2 MOA

Sent from my SM-G986U using Tapatalk

That's great to hear. Making sure I wasn't missing something

 

[j43097]

Since were on a relative subject... these cases are on their 4th or 5th load. Not been loading belted magnums long. Is that ring between the base and the belt of the L cartridge an indicator that this one is done?

 

[Mulyhuntr]

Since were on a relative subject... these cases are on their 4th or 5th load. Not been loading belted magnums long. Is that ring between the base and the belt of the L cartridge an indicator that this one is done?

Looks fine to me. I'd shoot it.

 

[Bater]

On belted mags (or any case really) you’ll get a slight visible ring just above the belt where the die stops during the sizing process. Obviously the same area is where we encounter case head separation though I can see nothing that would worry me from that picture.

 

[AC300win]

Can’t see a ring forming on your pics but when case head separation begins it can be very faint. Get a heavy paper clip, open up end and put a small short hook on the straightens end of clip. Insert the clip hook in your brass and scratch up and down near the base. If case head separation is starting you can feel it in the brass. Should be smooth. Anything out of ordinary toss the brass.

 

[11boo]

That is smoking velocity.